Cancer Research and Treatment

Original Articles

Effect of Smoking Cessation Duration on Lung Cancer Incidence: A Nationwide Retrospective Cohort Study in Korea: Myeong Geun Choi, Min-Ho Kim, Hong Jin Kim, Eun Mi Chun; Received October 10, 2025 Accepted February 25, 2026 Published online February 26, 2026; DOI: https://doi.org/10.4143/crt.2025.1099 [Accepted]

Abstract PDF: Purpose
While smoking cessation is known to reduce lung cancer risk, the extent to which smoking cessation duration mitigates lung cancer risk remains unclear. This study aimed to analyze the association between smoking cessation duration and the reduction in lung cancer incidence using large-scale health insurance data from Korea.
Materials and Methods
In this retrospective cohort study, we utilized the cohort from the Korea National Health Insurance Corporation. Approximately 50% of the adults aged ≥50 years who underwent health examinations in 2009–2013 were randomly sampled and followed using medical and health examination records. The participants were classified into three groups: never-smokers, former smokers, and current smokers, and the incidence rates of lung cancer were compared among these groups.
Results
We analyzed 165,512 individuals selected through propensity score matching (82,756 never-smokers, 41,378 former smokers, and 41,378 current smokers). Lung cancer risk significantly decreased after two years of smoking cessation (2–3 years after cessation: hazard ratio 0.760, p<0.001) but remained higher than that of never-smokers for up to 10 years. Subgroup analyses revealed similar tendencies among males, whereas no consistent patterns were observed among females. Moreover, a longer duration of smoking cessation was generally required for heavy smokers (≥20 pack-years) than for light smokers (<20 pack-years).
Conclusion
This nationwide cohort study highlights the significant impact of smoking cessation duration on lung cancer risk, emphasizing the substantial benefits of even short-term cessation regardless of prior smoking history.

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Assessing Radiation Pneumonitis Through Functional Lung Imaging: A Single Photon Emission Computed Tomography (SPECT)-Based Approach in Lung Cancer: Joo-Hyun Chung, Soo Jin Lee, Ji Young Kim, Hae Jin Park; Received November 13, 2025 Accepted February 18, 2026 Published online February 19, 2026; DOI: https://doi.org/10.4143/crt.2025.1248 [Accepted]

Abstract PDF: Purpose
To develop models to assess the risk of symptomatic radiation pneumonitis (SRP) (Common Terminology Criteria for Adverse Events 4.03 grade ≥ 2) in lung cancer patients by utilizing single-photon emission computed tomography (SPECT) for functional lung volume identification and dosimetric analysis.
Materials and Methods
This retrospective study included 71 lung cancer patients who underwent SPECT before radiotherapy from 2018 to 2024. Perfusion and ventilation SPECT images were co-registered with planning CT to define functional and anatomical lung volumes. Functional lung was defined as voxels with ≥ 20% of the maximum intensity on SPECT. Models to assess the risk of SRP were constructed using Cox regression and evaluated using corrected Akaike Information Criterion (AICc) and time-dependent receiver operating characteristic analysis.
Results
At a median follow-up of 16.8 months, 19 of 71 patients (26.8%) developed SRP. Factors significantly associated with SRP risk included planning target volume ≥ 150 mL, percentage of total perfusion-defined functional lung receiving ≥ 10 Gy (pVf10) exceeding that of total anatomical lung receiving ≥ 10 Gy (V10), percentage of total ventilation-defined lung receiving ≥ 10 Gy (vVf10) ≥ 45%, and ipsilateral vVf10 ≥ 60% (p=0.004, 0.004, 0.024, and 0.007, respectively). Among the three models, the model incorporating additional ventilation-based parameters demonstrated the best performance (AICc = 85.81, area under the curve = 0.819).
Conclusion
SPECT-based dosimetric parameters derived from perfusion and ventilation are significantly associated with the risk of SRP. Incorporating SPECT may improve risk stratification and enable lung-sparing strategies.

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Changes in Uptake, Participant Disparities, and Screening Outcomes of the Korean National Lung Cancer Screening Program: A Five-Year Experience: Chang Kyun Choi, Na-Young Lee, Mina Suh, Kui Son Choi, Yeol Kim; Received January 15, 2025 Accepted November 6, 2025 Published online November 10, 2025; DOI: https://doi.org/10.4143/crt.2025.067 [Accepted]

Abstract PDF: Purpose
Low-dose computed tomography (LDCT) is effective in reducing lung cancer mortality among high-risk smokers. The Korean National Lung Cancer Screening Program (KNLCS), the world’s first nationwide lung cancer screening initiative using LDCT, was launched in 2019. This study aimed to evaluate the KNLCS uptake rates in relation to participants’ economic status and changes in positive screening rates across screening rounds.
Materials and Methods
Data from the National Health Insurance Service (NHIS) and National Cancer Screening Information System for 2019–2023 were analyzed. Eligible participants in the KNLCS were current smokers aged 54–74 years with a smoking history of at least 30 pack-years. The KNLCS provides counseling by physicians on screening results and smoking cessation. Screening uptake rates, counseling rates, and Lung CT Screening Reporting and Data System (Lung-RADS) distributions were assessed.
Results
Screening uptake rates increased from 24.7% in 2019 to 51.2% in 2023 (p < 0.001). Economic disparities were observed, with higher-income groups showing consistently higher uptake rates than lower-income group. Screening positive rates has been decreased from 9.1% in 2019 to 7.0% in 2023 according to increasing the proportion of subsequent screening participants. The inter-institutional variance in Lung-RADS category 4 decreased significantly over the years (p < 0.001).
Conclusion
The KNLCS rapidly increased screening uptake rates by systematically inviting eligible participants. Positive screening rates decreased primarily due to a reduction in Lung-RADS category 3 findings in subsequent rounds.

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PHF10 is a Novel Substrate of Keap1 to Protect Non-Small-Cell Lung Cancer (NSCLC) Cells Against Oxidative Stress and Confer Ferroptosis Resistance: Xuan Lu, Ningning Kang, Yajun Chen, Xinru Zhao, Donglin Zhu, Jun Yang, Yong Yang, Hongya Xie; Received June 18, 2025 Accepted October 31, 2025 Published online November 3, 2025; DOI: https://doi.org/10.4143/crt.2025.635 [Accepted]

Abstract PDF: Purpose
Keap1 mutations mainly caused NRF2-dependent anti-oxidative stress responses, yet whether there are other downstream substrates and pathways remains unknown. This study aimed to uncover the role of Keap1 mutations in regulating PHF10-NRF2 axis in NSCLC and ferroptosis evasion.
Materials and Methods
Tandem affinity purification with mass spectrometry was used to screen peptides. Co-IP and ubiquitination assays were used to confirm the Keap1-PHF10 axis. A series of analyses in cell lines, patient samples, and xenograft models were conducted to uncover the functional dependency between Keap1 and NRF2. Transmission electron microscope was used to detect mitochondrion swelling under ferroptosis.
Results
Here, we reported that Keap1 binds and promotes polyubiquitination and degradation of PHF10, a subunit of the PBAF complex. NSCLC-associated Keap1 mutations are incapable of degrading PHF10, and thus induces PHF10 proteins stability. PHF10 ablation shows synthetic lethality in Keap1-deficient NSCLC cells. Mechanistically, PHF10 interacts with NRF2 to activate its downstream targets and enhance the NRF2-dependent anti-oxidative stress capacity in NSCLC. PHF10 recruits SMARCA2, one core cBAF subunit, to increase chromatin accessibility in NRF2-binding transcriptional regions. Cancer-associated Keap1 mutants confer resistance to ROS-induced cell death via accumulating PHF10-SMARCA2 complex. Increased PHF10 further induced ferroptosis resistance in Keap1-deficient NSCLC. Lastly, we utilized one small molecule inhibitor, SMARCA2-IN-8, to inhibit progression of Keap1-deficient NSCLC murine models.
Conclusion
Together, our study highlight the synthetic lethal relationship between Keap1 and PHF10, and provide targeting PHF10-SMARCA2 complex as an effective option to hit Keap1-deficient NSCLC.

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Predictive Role of Baseline Peripheral Lung SUVmax on PET/CT for Immune-Related Pneumonitis and Adverse Events in Lung Cancer Patients Treated with Immune Checkpoint Inhibitors: Kun Ho Kim, Seong Min Kim, Jeong Eun Lee, Song Soo Kim, Da Hyun Kang, Chaeuk Chung; Received May 22, 2025 Accepted October 22, 2025 Published online October 28, 2025; DOI: https://doi.org/10.4143/crt.2025.548 [Accepted]

Abstract PDF: Purpose
Immune checkpoint inhibitors (ICIs) offer durable responses in lung cancer patients lacking actionable mutations or with resistance to prior therapies. However, predicting their efficacy and associated immune-related adverse events (irAEs), such as severe pneumonitis, remains a clinical challenge. This study investigated the predictive value of positron emission tomography/computed tomography (PET/CT)-derived metabolic parameters for pneumonitis and other irAEs in lung cancer patients treated with ICIs.
Materials and Methods
We retrospectively analyzed 151 patients with advanced non-small cell lung cancer (NSCLC) who received ICIs as first-line treatment, either as monotherapy or in combination. Pre-treatment PET/CT was used to measure SUVmax at the primary tumor, tumor-uninvolved peripheral lung, and metastatic sites. Pneumonitis and irAEs were assessed using clinical and radiological findings.
Results
Pneumonitis, severe pneumonitis (grade ≥3), and irAEs occurred in 26.5%, 19.9%, and 37.1% of patients, respectively. A peripheral SUVmax cutoff of >1.1 significantly predicted pneumonitis (area under the curve [AUC] = 0.720, p <0.001). High peripheral SUVmax was associated with higher rates of pneumonitis (42.9% vs. 12.3%, p <0.001), severe pneumonitis (31.4% vs. 9.9%, p=0.001), and irAEs (46.4% vs. 29.5%, p=0.038). In multivariate analysis, high peripheral SUVmax independently predicted pneumonitis (odds ratio [OR]: 4.621; 95% confidence interval [CI]: 1.868–11.431; p=0.001), severe pneumonitis (OR: 2.848; 95% CI: 1.043–7.779; p=0.041), and irAEs (OR: 2.509; 95% CI: 1.114–5.504; p=0.022).
Conclusion
Baseline peripheral SUVmax on PET/CT may serve as a noninvasive biomarker for predicting immune-related pneumonitis and other irAEs in NSCLC patients receiving ICIs, supporting early risk identification.

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Impact of Occupational Lead Exposure on Lung Cancer Risk in Korean Male Workers: A Retrospective Cohort Study: Kyung-Eun Lee, Sanggil Lee, Jin-Ha Yoon, Shinhee Ye; Received March 12, 2025 Accepted September 30, 2025 Published online October 2, 2025; DOI: https://doi.org/10.4143/crt.2025.282 [Accepted]

Abstract PDF: Purpose
In 2006, the IARC reported that inorganic lead is carcinogenic in animals but with limited evidence in humans. In addition, some studies have reported that exposure to lead increases the risk of lung cancer, but this remains controversial. Therefore, we aimed to assess the risk of developing lung cancer according to blood lead levels in workers with occupational lead exposure.
Materials and Methods
A retrospective cohort study of male workers with 2009 blood lead (PbB) concentrations was conducted using nationwide special health examination data (SHED) from 2009 to 2021 and cancer registry data from 1999 to 2020 from the Republic of Korea. Standardized incidence ratios (SIRs) for lung cancer risk at each PbB level were calculated with a five-year wash-out period, adjusting for age, smoking status, duration of exposure, and the number of co-exposures to lung carcinogens.
Results
The study included 26,092 workers with an average follow-up period of 9.98 years. Compared with workers with PbB levels <3.130 µg/dL, the adjusted SIRs for lung cancer risk were 2.95 (95% confidence interval [CI]: 1.47–5.27) and 3.13 (95% CI: 1.82–5.00) for workers with PbB levels of 3.130–4.899 and ≥4.900 µg/dL, respectively, indicating a significant dose-response trend.
Conclusion
This study demonstrates a significant association between lead exposure and an increased risk of lung cancer, highlighting the need for stronger occupational health policies and ongoing monitoring of workers exposed to lead. The observed dose-response relationship underscores the importance of reassessing current occupational safety standards and strengthening measures to reduce lead exposure in the workplace.

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Genomic Insights into Innate Resistance in Early-Stage EGFR-Mutant Non-Small Cell Lung Cancer: A Comprehensive Analysis of Next-Generation Sequencing Data: Hayoung Seong, Soo Han Kim, Mi-Hyun Kim, Ahrong Kim, Ju Sun Song, Jung Seop Eom; Received January 28, 2025 Accepted August 19, 2025 Published online August 25, 2025; DOI: https://doi.org/10.4143/crt.2025.114 [Accepted]

Abstract PDF: Purpose
Comprehensive genomic profiling of early-stage non-small cell lung cancer (NSCLC) with epidermal growth factor receptor (EGFR) mutations remains limited. This study aimed to investigate genomic profiles of early- and advanced-stage EGFR-mutant NSCLC and identify potential innate resistance mechanisms to EGFR-tyrosine kinase inhibitors (TKIs) using targeted next-generation sequencing (NGS).
Materials and Methods
This retrospective observational study analyzed genomic profiles of patients with early-stage (IA–IIIA) and advanced-stage (IIIB–IV) EGFR-mutant NSCLC from the Lung Cancer NGS registry. Targeted NGS was performed to assess concurrent genetic alterations (GAs), tumor mutational burden (TMB), and variant allele frequency (VAF) of EGFR mutations.
Results
Overall, 160 patients (100 early-stage and 60 advanced-stage) were analyzed. The proportion of patients with concurrent GAs was not significantly different between stages (82.0% vs. 91.7%, p=0.092). Median TMB was 3.8 mutations/Mb in both stages, with no significant difference (p=0.206). However, the median VAF of EGFR mutations was significantly lower in early-stage compared to that in advanced-stage (19.3% vs. 29.6%, p=0.002). While TMB remained unchanged with disease progression (P = 0.192), VAF of EGFR mutations increased significantly (p<0.001). Moreover, the frequencies of concurrent single nucleotide variants and copy number variants were significantly lower in early-stage NSCLC.
Conclusion
Genomic heterogeneity in EGFR-mutant NSCLC arises early in tumorigenesis. The comparable TMB and lower VAF of EGFR mutations in early-stage disease suggest that innate resistance to EGFR-TKIs may be driven by concurrent GAs, supporting the consideration of combination therapies even in early-stage EGFR-mutant NSCLC.

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Trends and Outcomes of Lung Cancer Surgery in South Korea: Joon Beom Park, Su-Jin Cho, Myung-Il Hahm, Danbee Kang, Seong Yong Park; Received March 14, 2025 Accepted May 24, 2025 Published online May 27, 2025; DOI: https://doi.org/10.4143/crt.2025.295 [Epub ahead of print]

Abstract PDF Supplementary Material PubReader ePub: Purpose
This study analyzed nationwide trends in lung cancer surgery in South Korea over 14 years, focusing on surgical volume, patient demographics, surgical approaches, and outcomes.
Materials and Methods
We performed a retrospective cohort study using nationwide health insurance claims data (124,334 cases) and robotic surgery data (1,740 cases) provided by the manufacturer. Patients who underwent lung cancer surgery between 2010 and 2023 were included. Annual trends were assessed using the annual percentage change (APC), and logistic as well as linear regression models were used to identify predictors of mortality and prolonged hospital stay.
Results
The annual surgical volume increased from 4,557 in 2010 to 14,184 in 2023 (APC, 8.86%; p < 0.001). Video-assisted thoracoscopic surgery (VATS) became the predominant approach, rising from 52.9% to 94.8% (APC, 4.11%; p < 0.001). Sub-lobar resections increased, with wedge resections growing from 9.0% to 18.5% (APC, 5.72%; p < 0.001) and segmentectomies from 3.0% to 17.9% (APC, 14.63%; p < 0.001). The proportion of female patients increased from 32.0% to 44.7% (APC, 2.39%; p < 0.001), while patients aged 70-79 years increased from 26.3% to 32.3% (APC, 1.60%; p < 0.001) and those aged ≥ 80 years from 2.0% to 6.2% (APC, 9.63%; p < 0.001). The median hospital stay decreased from 13 to 7 days (APC, –4.34%; p < 0.001), and 30-day mortality declined from 2.45% to 0.76% (APC, –8.32%; p < 0.001).
Conclusion
Lung cancer surgery in Korea has increased substantially, with a notable shift toward minimally invasive and lung-sparing techniques that have improved outcomes. However, persistent disparities underscore the need for a national surgical registry.

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Gastrointestinal cancer

Deciphering the Risk of Developing Lung Cancer after the Diagnosis of Gastric Cancer with Genetic Evidence: A European and East Asian Populations–Based Mendelian Randomization Analysis: Jiansheng Chen, Aiming Zeng, Yunzhe Yu, Sida Sun, Liqun Liao, Siwei Huang, Zhongshan Yang, Junfeng Zhou, Weijie Wu; Cancer Res Treat. 2026;58(1):242-251. Published online April 18, 2025; DOI: https://doi.org/10.4143/crt.2024.875

Abstract PDF Supplementary Material PubReader ePub: Purpose
Lung cancer is frequently observed as a second primary malignancy following gastric cancer, yet the genetic causality between them remains uncertain. This study aims to evaluate the causal relationship between gastric and lung cancers using Mendelian randomization (MR) analysis.
Materials and Methods
Single nucleotide polymorphisms associated with gastric and lung cancers were selected from genome-wide association study in East Asian and European populations as instrumental variables. The causal effects between gastric and lung cancers were evaluated using univariable and multivariable MR analysis, with the inverse variance weighted (IVW) method serving as the primary criterion. Heterogeneity and sensitivity analyses were performed to ensure the robustness of the findings.
Results
Univariable MR analysis demonstrated that genetic susceptibility to gastric cancer in the European population was significantly associated with an increased risk of lung cancer (IVW: odds ratio [OR], 1.285; 95% confidence interval [CI], 1.072 to 1.541; p=6.83E-03), which was consistently validated in the East Asian population (IVW: OR, 1.356; 95% CI, 1.114 to 1.651; p=2.40E-03). Multivariable MR analysis further indicated that the significant positive causal relationship between gastric cancer and lung cancer persisted in both populations after adjusting for confounding factors (all p < 0.05). Conversely, no significant causal relationship was observed for the risk of developing gastric cancer following the diagnosis of lung cancer in either population (p > 0.05).
Conclusion
This study confirms that genetic susceptibility to gastric cancer increases the risk of lung cancer. This finding provides a theoretical basis for exploring the underlying biological mechanisms and suggests that enhancing lung cancer screening in patients with gastric cancer may be necessary to improve patient prognosis.

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Lung and Thoracic cancer

Novel Bronchoscopy Method for Molecular Profiling of Lung Cancer: Targeted Washing Technique: Mi-Hyun Kim, Hayoung Seong, Hyojin Jang, Saerom Kim, Wanho Yoo, Soo Han Kim, Jeongha Mok, Kwangha Lee, Ki Uk Kim, Min Ki Lee, Jung Seop Eom; Cancer Res Treat. 2026;58(1):107-114. Published online February 26, 2025; DOI: https://doi.org/10.4143/crt.2024.1128

Abstract PDF Supplementary Material PubReader ePub

Purpose
There have been efforts to find alternative samples other than standard samples of tissue or plasma for mutational analyses for lung cancer patients. However, no other sample or technique has replaced the mutational analyses using standard samples. In this prospective study, we assessed a novel bronchoscopy method, named as targeted washing technique, for detecting the epidermal growth factor receptor (EGFR) mutation.
Materials and Methods
A 3.0-mm ultrathin bronchoscope was precisely navigated to the target lung lesion with the assistance of virtual bronchoscopic navigation and fluoroscopy. Once the bronchoscope is placed in front of target lung lesion, 0.9% normal saline was instilled for targeted washing. EGFR testing using targeted washing fluid (TWF) was compared to standard methods using plasma or tumor tissue.
Results
In 41 TWF samples, the T790M mutation was detected in tissue, plasma, and TWF samples at rates of 22.0%, 9.8%, and 29.3%, respectively. The overall EGFR T790M detection rate using tissue, plasma, or TWF samples was 36.6%, with TWF samples increasing the T790M mutation detection rate by up to 10%. The accuracy of T790M mutation detection using TWF sample was 82.9% compared with standard samples. Four patients were found to have the EGFR T790M mutation solely through EGFR testing using TWF, which repeated rebiopsies using either plasma or tissue finally confirmed to have the T790M mutation.
Conclusion
We demonstrated the clinical potential of targeted washing technique for molecular testing, which can be a good option to overcome spatial heterogeneity, low sensitivity of plasma sample or technical limitations in collecting tumor tissues.

Citations

Citations to this article as recorded by

Comparison of the safety and efficacy of remimazolam for sedation during bronchoscopy: a meta-analysis of randomized controlled trials
Yupei Yuan, Chunlei Chang, Jing Zhang, Liang Liang
PeerJ.2026; 14: e20552. CrossRef

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Association between Antipsychotic Drug and Survival in Patients with Lung Cancer Treated with Chemoradiotherapy: A Nationwide Korean Cohort Study: Dong-Yun Kim, In Gyu Hwang, Sun Mi Kim, Dae Ryong Kang, Tae-Hwa Go, Se Hwa Hong, Shin Young Park, Hyunho Lee, Jin Hwa Choi; Cancer Res Treat. 2025;57(4):1030-1039. Published online February 6, 2025; DOI: https://doi.org/10.4143/crt.2024.554

Abstract PDF Supplementary Material PubReader ePub: Purpose
Antipsychotic drugs (APDs) can be used to relieve psychological symptoms in patients with cancer. We investigated the nationwide use of APDs during concurrent chemoradiotherapy (CCRT) for patients with lung cancer and its association with overall survival (OS).
Materials and Methods
The National Health Service database was used in this retrospective cohort study. Patients diagnosed with lung cancer between 2010 and 2020 who received cisplatin-based CCRT were included. The APDs included in the analysis were aripiprazole, quetiapine, olanzapine, risperidone, haloperidol, and chlorpromazine, and the APD prescription details included prescription time, dosage, and duration.
Results
Among the 23,099 patients with lung cancer treated with CCRT, 2,662 (11.5%) took APDs concurrently. Quetiapine (47.3%) and chlorpromazine (36.6%) were the frequently prescribed APDs. In the univariate analysis, patients prescribed APDs during CCRT had a significantly worse OS than those who did not take APDs. The 2-year OS rates for APD (+) and APD (–) patients were 20.4% and 36.4%, respectively (p < 0.001). Multivariable analyses revealed that APD prescription, male, age > 80 years, and comorbidities, such as hypertension, myocardial infarction, and depressive disorder, significantly influenced OS. In patients who used APDs during CCRT, APD prescription timing (pre-CCRT vs. during CCRT), dosage (low vs. high) and duration (within 6 months vs. over 6 months) had no significant difference.
Conclusion
Overall, 11.5% of patients with lung cancer used APDs during CCRT. Patients who used APDs during CCRT had poorer survival than those who did not. Further studies are required to elucidate the effects of APDs on patients with cancer.

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Factors Associated with Smoking Cessation of Participants in the National Lung Cancer Screening Program in Korea: Na-Young Yoon, Minji Seo, Nayoung Lee, Yeol Kim; Cancer Res Treat. 2025;57(4):989-999. Published online January 10, 2025; DOI: https://doi.org/10.4143/crt.2024.653

Abstract PDF Supplementary Material PubReader ePub

Purpose
Smoking cessation interventions for participants in lung cancer screening are essential for increasing the effectiveness of screening to reduce lung cancer mortality. This study aimed to investigate the factors that lead to smoking cessation after lung cancer screening.
Materials and Methods
The Korean National Lung Cancer Screening (KNLCS) Satisfaction Survey was conducted from 2021 to 2022 with approximately 1,000 samples per year among participants in KNLCS targeting 30 or more pack-year smokers. Factors associated with smoking cessation were analyzed based on the survey.
Results
Among 1,525 current smokers in the survey participants, 728 (47.7%) received screening result counseling from physician after screening and showed significantly higher smoking cessation rate than non-counseling participants (odds ratio [OR], 2.17; 95% confidence interval [CI], 1.27 to 3.70). The participants who considered the counseling helpful were more likely to quit smoking (OR, 3.53; 95% CI, 2.00 to 6.22) and to reduce smoking amount (OR, 2.05; 95% CI, 1.54 to 2.71). Similarly, those who received physicians’ active recommendations to quit smoking were likely to quit smoking (OR, 2.20; 95% CI, 1.25 to 3.87) and to decrease smoking amount (OR, 1.30; 95% CI, 1.00 to 1.68). In contrast, participants who had no abnormal findings from screening tended to have no significant change in smoking status despite the physicians’ active recommendations to quit smoking.
Conclusion
Physicians’ active recommendations and effective counseling to quit smoking could be a key factor in increasing smoking cessation among lung cancer screening participants. Further research should be conducted to develop more effective strategies for smoking cessation to participants without abnormal findings in lung cancer screening.

Citations

Citations to this article as recorded by

Quality, Standards, and Optimal Training of Radiologists for Lung Cancer Screening
Dorith Shaham, Ella A. Kazerooni
Journal of Thoracic Imaging.2026;[Epub] CrossRef

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Long-term Survival Outcomes of Surgical Resection for Lung Adenocarcinoma with Intraoperatively Diagnosed Pleural Metastasis: Target Treatment Era: Yelee Kwon, Jae Kwang Yun, Geun Dong Lee, Se Hoon Choi, Yong-Hee Kim, Hyeong Ryul Kim; Cancer Res Treat. 2025;57(4):981-988. Published online December 30, 2024; DOI: https://doi.org/10.4143/crt.2024.993

Abstract PDF Supplementary Material PubReader ePub: Purpose
This study aimed to evaluate the clinical impact of main tumor resection on long-term survival compared with pleural biopsy alone in patients with lung adenocarcinoma who were intraoperatively diagnosed with pleural metastasis.
Materials and Methods
A total of 176 patients with adenocarcinoma who had unexpected pleural metastasis detected during surgery from 2002 to 2021 were retrospectively analyzed. Each surgeon decided whether to perform main tumor resection or pleural biopsy alone.
Results
The patients were grouped based on the surgical approaches: main tumor resection (resection group; n=83) and pleural biopsy only (O&C group; n=93). The resection group had better overall survival (OS; 10-year survival, 27.9% vs. 9.4%; median survival, 68.3 vs. 36.6 months; p < 0.01) and locoregional progression-free survival (10-year survival, 12.5% vs. 7.1%; median survival, 19.6 vs. 10.6 months; p < 0.01) than the O&C group. Similar results were found for OS in patients who received tyrosine kinase inhibitors (TKIs) as first-line therapy (10-year survival, 49.2% vs. 15.0%; median survival, 72.2 vs. 45.4 months; p=0.03), patients who did not undergo TKIs treatment (10-year survival, 29.4% vs. 9.2%; median survival, 82.4 vs. 23.8 months; p < 0.01), and patients with positive target gene mutation (10-year survival, 31.7% vs. 10.1%; median survival, 72.2 vs. 33.7 months; p < 0.01). In multivariate analysis, pleural biopsy only (hazard ratio, 1.73; p=0.04) was a significant predictor of OS.
Conclusion
Main tumor resection can improve survival in patients with lung adenocarcinoma who had unexpected pleural metastasis during operation.

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Review Article

The Era of Antibody Drug Conjugates in Lung Cancer: Trick or Threat?: Mariona Riudavets, David Planchard; Cancer Res Treat. 2025;57(2):293-311. Published online November 28, 2024; DOI: https://doi.org/10.4143/crt.2024.714

Abstract PDF PubReader ePub

Antibody drug conjugates (ADCs) are a novel class of therapeutics that structurally are composed by an antibody directed to a tumor epitope connected via a linker to a cytotoxic payload, and that have shown significant antitumor activity across a range of malignancies including lung cancer. In this article we review the pharmacology and design of ADCs, as well as we describe the results of different studies evaluating ADCs in lung cancer directed to several targets including HER2, HER3, TROP2, MET, CEACAM5 and DLL3.

Citations

Citations to this article as recorded by

Evaluating the efficacy and safety of antibody–drug conjugates in non-small cell lung cancer: a systematic review and meta-analysis
Linling Zhang, Hongyuan Jia, Bin Niu
BMC Cancer.2026;[Epub] CrossRef
The emerging role of antibody-drug conjugates in EGFR-mutant non-small cell lung cancer with acquired resistance to third-generation EGFR tyrosine kinase inhibitors
Yi-Chen Zhang, Wei-Chi Luo, Jia-Ting Li, Lv Wu, Zhi-Hong Chen, Qing Zhou
Journal of Controlled Release.2026; : 114747. CrossRef

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Original Articles

Lung and Thoracic cancer

Association of Shorter Time to Recurrence and Recurrence-Free Survival with Transthoracic Lung Biopsy in Stage I Lung Cancer: Kum Ju Chae, Hyunsook Hong, Hyungin Park, Soon Ho Yoon; Cancer Res Treat. 2025;57(2):387-400. Published online September 2, 2024; DOI: https://doi.org/10.4143/crt.2024.560

Abstract PDF Supplementary Material PubReader ePub

Purpose
We aim to determine whether preoperative percutaneous needle aspiration or biopsy (PCNA/Bx) increases recurrence risk and reduces survival in stage I lung cancer patients, using a nationwide lung cancer registry.
Materials and Methods
We retrospectively included 3,452 patients diagnosed with stage I lung cancer who underwent curative surgery between 2014 and 2019, as recorded in the Korean Association of Lung Cancer Registry. To balance the characteristics of patients with and without PCNA/Bx, we applied inverse probability of treatment weighting. We used cumulative incidence plots and a weighted subdistribution hazard model to analyze time to recurrence. Recurrence-free survival and overall survival were analyzed using Kaplan-Meier curves and weighted Cox proportional hazard ratio models.
Results
In patients with adenocarcinoma, the use of PCNA/Bx was associated with a 1.9-fold increase (95% confidence interval [CI], 1.5 to 2.4) in the risk of recurrence and a 1.7-fold decrease (95% CI, 1.3 to 2.2) in recurrence-free survival. Subgroup analysis based on pathologic pleural invasion revealed that the risk of recurrence increased when PCNA/Bx was performed, with 2.1-fold (95% CI, 1.5 to 2.8) in patients without pleural invasion and 1.6-fold (95% CI, 1.0 to 2.4) in those with pleural invasion. No association was found between the use of PCNA/Bx and overall survival.
Conclusion
Preoperative PCNA/Bx was associated with increased recurrence risks in stage I adenocarcinoma, regardless of pathologic pleural invasion status. In early lung cancer cases where adenocarcinoma is strongly suspected and curative surgery is feasible, the use of transthoracic biopsy should be approached with caution.

Citations

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Recurrence Risk Following Percutaneous Transthoracic Needle Biopsy in Patients Undergoing Sublobar Resection for Stage I Lung Cancer
Yura Ahn, Geun Dong Lee, SeHoon Choi, Hyeong Ryul Kim, Yong-Hee Kim, Dong Kwan Kim, Seung-Il Park, Kyung-Hyun Do, Joon Beom Seo, Jae Kwang Yun, Sang Min Lee
Radiology.2025;[Epub] CrossRef

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Association of TP53 Mutation Status and Sex with Clinical Outcome in Non–Small Cell Lung Cancer Treated with Immune Checkpoint Inhibitors: A Retrospective Cohort Study: Songji Choi, Se Hyun Kim, Sejoon Lee, Jeongmin Seo, Minsu Kang, Eun Hee Jung, Sang-A Kim, Koung Jin Suh, Ji Yun Lee, Ji-Won Kim, Jin Won Kim, Jeong-Ok Lee, Yu Jung Kim, Keun-Wook Lee, Jee Hyun Kim, Soo-Mee Bang, Jong Seok Lee; Cancer Res Treat. 2025;57(1):70-82. Published online August 7, 2024; DOI: https://doi.org/10.4143/crt.2024.046

Abstract PDF Supplementary Material PubReader ePub

Purpose
Some studies suggest that TP53 mutations are associated with the response to immune checkpoint inhibitors (ICI) in patients with non–small cell lung cancer (NSCLC) and also contribute to sex disparities in several cancers. Thus, we hypothesized that TP53 mutations might serve as sex-dependent genomic biomarkers of ICI treatment response in patients with NSCLC.
Materials and Methods
Clinical data of 100 patients with metastatic NSCLC treated with ICI monotherapy at Seoul National University Bundang Hospital (SNUBH) were retrospectively reviewed. Genomic and clinical datasets of The Cancer Genome Atlas and an ICI-treated lung cancer cohort (cBioPortal) were also analyzed.
Results
In SNUBH cohort, no statistically significant difference was observed in the median progression-free survival (PFS) according to TP53 mutation status (p=0.930); however, female patients with TP53 mutations (MT) had a significantly prolonged median PFS compared to wild-type (WT) (6.1 months in TP53 MT vs. 2.6 months in TP53 WT; p=0.021). Programmed death-ligand 1 (PD-L1) high (≥ 50%) expression was significantly enriched in female patients with TP53 MT (p=0.005). The analysis from publicly available dataset also revealed that females with NSCLC with TP53 MT showed significantly longer PFS than those with TP53 WT (p < 0.001). In The Cancer Genome Atlas analysis, expression of immune-related genes, and tumor mutation burden score in TP53 MT females were higher than in males without TP53 MT.
Conclusion
Female patients with NSCLC with TP53 mutations had high PD-L1 expression and showed favorable clinical outcomes following ICI therapy, suggesting a need for further research to explore the role of TP53 mutations for sex disparities in response to ICI therapy.

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Association Between TP53 Mutations and Platinum Resistance in a Cohort of High-Grade Serous Ovarian Cancer Patients: Novel Implications for Personalized Therapeutics
Clelia Madeddu, Eleonora Lai, Manuela Neri, Elisabetta Sanna, Giulia Gramignano, Sonia Nemolato, Mario Scartozzi, Sabrina Giglio, Antonio Macciò
International Journal of Molecular Sciences.2025; 26(5): 2232. CrossRef
Prognostic and predictive implications of tumor suppressor gene alterations in non-small cell lung cancer
Marco Sposito, Lorenzo Belluomini, Riccardo Nocini, Jessica Insolda, Ilaria Mariangela Scaglione, Jessica Menis, Michele Simbolo, Antonio Lugini, Federica Buzzacchino, Francesco Verderame, Francesca Spinnato, Giuseppe Aprile, Lorenzo Calvetti, Mario Occhi
Scientific Reports.2025;[Epub] CrossRef
Enhanced tumor heterogeneity mediates poor prognosis in females with TP53 mutation in lung adenocarcinoma
Liudan Mai, Xinxin Yang, Chen Shao, Hongwei Yu, Fenqi Du, Jialu Liu, Yue Guan, Hao Li, Maopeng Yang, Hongxue Meng, Qiuju Zhang
International Journal of Biological Macromolecules.2025; 334: 149083. CrossRef

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Special Article

Trends in Cancer-Screening Rates in Korea: Findings from the National Cancer Screening Survey, 2004-2023: EunKyo Kang, Kui Son Choi, Jae Kwan Jun, Yeol Kim, Hyeon Ji Lee, Chang Kyun Choi, Tae Hee Kim, Sun Hwa Lee, Mina Suh; Cancer Res Treat. 2025;57(1):28-38. Published online August 2, 2024; DOI: https://doi.org/10.4143/crt.2024.325

Abstract PDF Supplementary Material PubReader ePub

Purpose
This study aimed to report the overall national trends in the rates of cancer screening based on recommendations and provide insights into the changing trends of these rates across different demographics.
Materials and Methods
This study used data from the Korean National Cancer Screening Survey (KNCSS), which surveys nationwide cancer-screening rates and includes 4,500 individuals meeting the Korean National Cancer Screening Program (NCSP) protocol age criteria. Cancer-screening rates were assessed using structured questionnaires; yearly trends were analyzed for both lifetime cancer-screening rates and rates of screening based on recommendations, and subgroup analyses were performed based on age and sex.
Results
The rates of cancer screening based on recommendations showed significant increments: the stomach cancer-screening rate increased from 39.2% in 2004 to 77.5% in 2023 (3.50% per year), the liver cancer-screening rate increased from 20.0% to 48.8% (4.30% per year), and the colorectal cancer, increased from 19.9% to 70.7% (5.15% per year). The breast cancer-screening rate increased from 33.2% to 72.7% (2.88% per year), and the cervical cancer, increased from 58.3% to 70.2% (1.08% per year). Despite some differences, particularly in relation to sociodemographic factors, screening rates increased significantly for all cancer types.
Conclusion
Cancer-screening rates in Korea increased consistently from 2004 to 2023, demonstrating the effectiveness of the national cancer-screening program. However, the increments in breast, cervical and lung cancer-screening rates were relatively lower, indicating the need for additional efforts and strategies.

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Practice of Cytopathology in Korea: A 40‐Year Evolution Through Standardization, Digital Transformation, and Global Partnership
Yosep Chong, Ran Hong, Hyeong Ju Kwon, Haeryoung Kim, Lucia Kim, Soon Jae Kim, Yoon Jung Choi
Diagnostic Cytopathology.2026; 54(2): 146. CrossRef
Persistent income-related inequalities in cancer screening utilisation in South Korea: Evidence from repeated cross-sectional data, 2013–2023
Soyun An, Sunghyun Yi, Jihyung Hong
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Association Between Suicidal Ideation and Cancer Screening Uptake: Results from Middle-Aged and Older Adults in Korea
Seong-Uk Baek, Jin-Ha Yoon
Cancers.2025; 17(6): 956. CrossRef
From pilot to policy: what Korea’s LDCT program teaches us about National Lung Cancer Screening
Lisa Jungblut
European Radiology.2025; 35(12): 8162. CrossRef
Current Status of the National Cancer Screening Program in Korea: History, Achievements, and Future Directions
Kyeongmin Lee, Mina Suh, Kui Son Choi
Journal of Preventive Medicine and Public Health.2025; 58(4): 337. CrossRef
Optimal interval of screening endoscopy for reducing gastric cancer mortality: a nationwide cohort study
Soo-Yoon Sung, Hyun Ho Choi, Seung Ho Sin, Hyung-Keun Kim, Sang Woo Kim, Sung Soo Kim
Gastrointestinal Endoscopy.2025;[Epub] CrossRef
Inequalities in breast cancer incidence and mortality in women with and without disabilities in South Korea: A population-based cohort study
Hee-Yeon Kang, Eunjung Park, Thi Tra Bui, Byungmi Kim, Jin-Kyoung Oh
Preventive Medicine Reports.2025; 59: 103242. CrossRef
Presentation of Benefits and Harms in Cancer Screening Guidelines for Koreans: A Systematic Review
Mi Ah Han, Hunju Lee, Kwangmin Kim, Seong Jung Kim, Eu Chang Hwang, Jae Hung Jung
Cancer Research and Treatment.2025; 57(4): 923. CrossRef
Association of Elevated Serum Triglycerides with Colorectal Cancer Risk: Findings from a Large-scale Prospective Cohort of Korean Adults
Sukhong Min, Hyobin Lee, Sinyoung Cho, Seung-Yong Jeong, Aesun Shin, Daehee Kang
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Information Landscape on Cervical Cancer: An Analysis of News and Online Platform Data in the Republic of Korea
Hye-Sun Lee, Gyeong-U Hong, Wonjeong Jeong, Kyounghee Oh, Jae Kwan Jun
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Original Articles

Lung and Thoracic cancer

Recurrence Dynamics of Pathological N2 Non–Small Cell Lung Cancer Based on IASLC Residual Tumor Descriptor: In Ha Kim, Geun Dong Lee, Sehoon Choi, Hyeong Ryul Kim, Yong-Hee Kim, Dong Kwan Kim, Seung-Il Park, Jae Kwang Yun; Cancer Res Treat. 2025;57(1):105-115. Published online July 23, 2024; DOI: https://doi.org/10.4143/crt.2024.150

Abstract PDF Supplementary Material PubReader ePub

Purpose
This study investigated the recurrence patterns and timing in patients with pathologic N2 (pN2) non-small cell lung cancer (NSCLC) according to the residual tumor (R) descriptor proposed by the International Association for the Study of Lung Cancer (IASLC).
Materials and Methods
From 2004 to 2021, patients with pN2 NSCLC who underwent anatomical resection were analyzed according to the IASLC R criteria using medical records from a single center. Survival analysis was performed using Cox proportional hazards models. Recurrence patterns between complete (R0) and uncertain resections (R[un]) were compared.
Results
In total, 1,373 patients were enrolled in this study: 576 (42.0%) in R0, 286 (20.8%) in R(un), and 511 (37.2%) in R1/R2 according to the IASLC R criteria. The most common reason for R(un) classification was positivity for the highest lymph node (88.8%). In multivariable analysis, the hazard ratios for recurrence in R(un) and R1/R2 compared to R0 were 1.18 (95% confidence interval [CI], 0.96–1.46) and 1.58 (1.31–1.90), respectively. The hazard rate curves displayed similar patterns among groups, peaking at approximately 12 months after surgery. There was a significant difference in distant recurrence patterns between R0 and R(un). Further analysis after stratification with the IASLC N2 descriptor showed significant differences in distant recurrence patterns between R0 and R(un) in patients pN2a1 and pN2a2 disease, but not in those with pN2b disease.
Conclusion
The IASLC R criteria has prognostic relevance in patients with pN2 NSCLC. R(un) is a highly heterogeneous group, and the involvement of the highest mediastinal lymph node can affect distant recurrence patterns.

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Evaluation of Uncertain Resection for Localized Non-small Cell Lung Cancer: The Crucial Prognosis of Suboptimal Lymph Node Assessment
Romain Vergé, Axel Rouch, Pierre Rabinel, Claire Renaud, Mathilde Cazaux, Laurent Brouchet
The Annals of Thoracic Surgery.2025; 120(4): 637. CrossRef

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Differences in the Prognostic Impact between Single-Zone and Multi-Zone N2 Node Metastasis in Patients with Station-Based Multiple N2 Non–Small Cell Lung Cancer: Shia Kim, Geun Dong Lee, SeHoon Choi, Hyeong Ryul Kim, Yong-Hee Kim, Dong Kwan Kim, Seung-Il Park, Jae Kwang Yun; Cancer Res Treat. 2025;57(1):95-104. Published online July 22, 2024; DOI: https://doi.org/10.4143/crt.2024.120

Abstract PDF Supplementary Material PubReader ePub

Purpose
The International Association for the Study of Lung Cancer suggests further subdivision of pathologic N (pN) category in non–small-cell lung cancer (NSCLC) by incorporating the location and number of involved lymph node (LN) stations. We reclassified patients with the station-based N2b disease into single-zone and multi-zone N2b groups and compared survival outcomes between the groups.
Materials and Methods
This retrospective study included patients with pN2 NSCLC who underwent lobectomy from 2006 to 2019. The N2 disease was subdivided into four categories: single-station N2 without N1 (N2a1), single-station N2 with N1 (N2a2), multiple-station N2 with single zone involvement (single-zone N2b), and multiple-station N2 with multiple zone involvement (multi-zone N2b). LN zones included in the subdivision of N2 disease were upper mediastinal, lower mediastinal, aortopulmonary, and subcarinal.
Results
Among 996 eligible patients, 211 (21.2%), 394 (39.6%), and 391 (39.3%) were confirmed to have pN2a1, pN2a2, and pN2b disease, respectively. In multivariable analysis after adjustment for sex, age, pT category, and adjuvant chemotherapy, overall survival was significantly better with single-zone N2b disease (n=125, 12.6%) than with multi-zone N2b disease (n=266, 26.7%) (hazard ratio [HR], 0.67; 95% confidence interval [CI], 0.49 to 0.90; p=0.009) and was comparable to that of N2a2 disease (HR, 1.12; 95% CI, 0.83 to 1.49; p=0.46).
Conclusion
Prognosis of single-zone LN metastasis was better than that of multiple-zone LN metastasis in patients with N2b NSCLC. Along with the station-based N descriptors, zone-based descriptors might ensure optimal staging, enabling the most appropriate decision-making on adjuvant therapy for patients with pN2 NSCLC.

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Impact of Lymph Node Metastasis Patterns on Long-Term Survival in Upper Lobe Non-Small Cell Lung Cancer
Nikolas Achilleos, Inna Schott, Fabian Doerr, Konstantinos Grapatsas, Natalie Baldes, Christian Taube, Dirk Theegarten, Maja Guberina, Nika Guberina, Martin Stuschke, Halime Kalkavan, Martin Metzenmacher, Martin Schuler, Servet Bölükbas
European Journal of Cardio-Thoracic Surgery.2026;[Epub] CrossRef
Prediction of Lymph Node Metastasis in Non–Small Cell Lung Carcinoma Using Primary Tumor Somatic Mutation Data
Victor Lee, Nicholas S. Moore, Joshua Doyle, Daniel Hicks, Patrick Oh, Shari Bodofsky, Sajid Hossain, Abhijit A. Patel, Sanjay Aneja, Robert Homer, Henry S. Park
JCO Clinical Cancer Informatics.2025;[Epub] CrossRef

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142 Download
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Enhancing Identification of High-Risk cN0 Lung Adenocarcinoma Patients Using MRI-Based Radiomic Features: Harim Kim, Jonghoon Kim, Soohyun Hwang, You Jin Oh, Joong Hyun Ahn, Min-Ji Kim, Tae Hee Hong, Sung Goo Park, Joon Young Choi, Hong Kwan Kim, Jhingook Kim, Sumin Shin, Ho Yun Lee; Cancer Res Treat. 2025;57(1):57-69. Published online June 26, 2024; DOI: https://doi.org/10.4143/crt.2024.251

Abstract PDF Supplementary Material PubReader ePub: Purpose
This study aimed to develop a magnetic resonance imaging (MRI)–based radiomics model to predict high-risk pathologic features for lung adenocarcinoma: micropapillary and solid pattern (MPsol), spread through air space, and poorly differentiated patterns.
Materials and Methods
As a prospective study, we screened clinical N0 lung cancer patients who were surgical candidates and had undergone both ¹⁸F-fluorodeoxyglucose (FDG) positron emission tomography–computed tomography (PET/CT) and chest CT from August 2018 to January 2020. We recruited patients meeting our proposed imaging criteria indicating high-risk, that is, poorer prognosis of lung adenocarcinoma, using CT and FDG PET/CT. If possible, these patients underwent an MRI examination from which we extracted 77 radiomics features from T1-contrast-enhanced and T2-weighted images. Additionally, patient demographics, maximum standardized uptake value on FDG PET/CT, and the mean apparent diffusion coefficient value on diffusion-weighted image, were considered together to build prediction models for high-risk pathologic features.
Results
Among 616 patients, 72 patients met the imaging criteria for high-risk lung cancer and underwent lung MRI. The magnetic resonance (MR)–eligible group showed a higher prevalence of nodal upstaging (29.2% vs. 4.2%, p < 0.001), vascular invasion (6.5% vs. 2.1%, p=0.011), high-grade pathologic features (p < 0.001), worse 4-year disease-free survival (p < 0.001) compared with non-MR-eligible group. The prediction power for MR-based radiomics model predicting high-risk pathologic features was good, with mean area under the receiver operating curve (AUC) value measuring 0.751-0.886 in test sets. Adding clinical variables increased the predictive performance for MPsol and the poorly differentiated pattern using the 2021 grading system (AUC, 0.860 and 0.907, respectively).
Conclusion
Our imaging criteria can effectively screen high-risk lung cancer patients and predict high-risk pathologic features by our MR-based prediction model using radiomics.

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Development of the Korean Association for Lung Cancer Clinical Practice Guidelines: Recommendations on Radial Probe Endobronchial Ultrasound for Diagnosing Lung Cancer - An Updated Meta-Analysis: Soo Han Kim, Hyun Sung Chung, Jinmi Kim, Mi-Hyun Kim, Min Ki Lee, Insu Kim, Jung Seop Eom; Cancer Res Treat. 2024;56(2):464-483. Published online November 29, 2023; DOI: https://doi.org/10.4143/crt.2023.749

Abstract PDF Supplementary Material PubReader ePub

Purpose
Radial probe endobronchial ultrasound (RP-EBUS) accurately locates peripheral lung lesions (PLLs) during transbronchial biopsy (TBB). We performed an updated meta-analysis of the diagnostic yield of TBB for PLLs using RP-EBUS to generate recommendations for the development of the Korean Association of Lung Cancer guidelines.
Materials and Methods
We systematically searched MEDLINE and EMBASE (from January 2013 to December 2022), and performed a meta-analysis using R software. The diagnostic yield was evaluated by dividing the number of successful diagnoses by the total lesion number. Subgroup analysis was performed to identify related factors.
Results
Forty-one studies with a total of 13,133 PLLs were included. The pooled diagnostic yield of RP-EBUS was 0.72 (95% confidence interval [CI], 0.70 to 0.75). Significant heterogeneity was observed among studies (χ²=292.38, p < 0.01, I²=86.4%). In a subgroup analysis, there was a significant difference in diagnostic yield based on RP-EBUS findings (within, adjacent to, invisible), with a risk ratio of 1.45 (95% CI, 1.23 to 1.72) between within and adjacent to, 4.20 (95% CI, 1.89 to 9.32) between within and invisible, and 2.59 (95% CI, 1.32 to 5.01) between adjacent to and invisible. There was a significant difference in diagnostic yield based on lesion size, histologic diagnosis, computed tomography (CT) bronchus sign, lesion character, and location from the hilum. The overall complication rate of TBB with RP-EBUS was 6.8% (bleeding, 4.5%; pneumothorax, 1.4%).
Conclusion
Our study showed that TBB with RP-EBUS is an accurate diagnostic tool for PLLs with good safety profiles, especially for PLLs with within orientation on RP-EBUS or positive CT bronchus sign.

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Peripheral bronchoscopy: back to basics
Pipetius Quah, Pyng Lee
Current Opinion in Pulmonary Medicine.2026; 32(1): 8. CrossRef
Can intraoperative improvement of radial endobronchial ultrasound imaging enhance the diagnostic yield in peripheral pulmonary lesions?
Kazuki Nishida, Takayasu Ito, Shingo Iwano, Shotaro Okachi, Shota Nakamura, Basile Chrétien, Toyofumi Fengshi Chen-Yoshikawa, Makoto Ishii
BMC Pulmonary Medicine.2025;[Epub] CrossRef
Transbronchial Cryobiopsy under Simultaneous Confocal Laser Endomicroscopy Guidance for Peripheral Pulmonary Lesions: A Pilot Study
Daniela Gompelmann, Anastasia Papaporfyriou, Christina Bal, Yasmin Merza, Berta Mosleh, Felicitas Oberndorfer, Edda Tschernko, Mir Alireza Hoda, Marco Idzko
Respiration.2025; 105(2): 305. CrossRef
A predictive model for diagnosing peripheral pulmonary lesions using radial probe endobronchial ultrasound images
Minlong Zhang, Cuiping Yang, Yinghua Guo
Scientific Reports.2025;[Epub] CrossRef

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5 Web of Science
4 Crossref

Aggressive Local Ablative Radiotherapy Mitigates Progression Risk in Oligometastatic Lung Adenocarcinoma: Gowoon Yang, Kyung Hwan Kim, Chang Geol Lee, Min Hee Hong, Hye Ryun Kim, Yeona Cho, Hong In Yoon; Cancer Res Treat. 2024;56(1):115-124. Published online August 29, 2023; DOI: https://doi.org/10.4143/crt.2023.600

Abstract PDF Supplementary Material PubReader ePub: Purpose
This study aimed to determine the role of local ablative radiotherapy (LART) in oligometastatic/oligoprogressive lung adenocarcinoma.
Materials and Methods
Patients (n=176) with oligometastatic lung adenocarcinoma treated with LART were identified, and those treated with LART at the initial diagnosis of synchronous oligometastatic disease (OMD group) or treated with LART when they presented with repeat oligoprogression (OPD group) were included.
Results
In the OMD group (n=54), the 1- and 3-year progression-free survival (PFS) were 50.9% and 22.5%, respectively, whereas the 1- and 3-year overall survival in the OPD group were 75.9% and 58.1%, respectively. Forty-one patients (75.9%) received LART at all gross disease sites. Tyrosine kinase inhibitor (TKI) use and all-metastatic site LART were significant predictors of higher PFS (p=0.018 and p=0.046, respectively). In patients treated with TKIs at the time of LART (n=23) and those treated with all-metastatic site LART, the 1-year PFS was 86.7%, while that of patients not treated with all-metastatic site LART was 37.5% (p=0.006). In the OPD group (n=122), 67.2% of the patients (n=82) maintained a systemic therapy regimen after LART. The cumulative incidence of changing systemic therapy was 39.6%, 62.9%, and 78.5% at 6 months, 1 year, and 2 years after LART, respectively.
Conclusion
Aggressive LART can be an option to improve survival in patients with oligometastatic disease. Patients with synchronous oligometastatic disease receiving TKI and all-metastatic site LART may have improved PFS. In patients with repeat oligoprogression, LART might potentially extend survival by delaying the need to change the systemic treatment regimen.

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201 Download

Strategies to Improve Smoking Cessation for Participants in Lung Cancer Screening Program: Analysis of Factors Associated with Smoking Cessation in Korean Lung Cancer Screening Project (K-LUCAS): Yeol Kim, Jaeho Lee, Eunju Lee, Juntae Lim, Yonghyun Kim, Choon-Taek Lee, Seung Hun Jang, Yu-Jin Paek, Won-Chul Lee, Chan Wha Lee, Hyae Young Kim, Jin Mo Goo, Kui Son Choi, Boyoung Park, Duk Hyoung Lee, Hong Gwan Seo; Cancer Res Treat. 2024;56(1):92-103. Published online August 7, 2023; DOI: https://doi.org/10.4143/crt.2022.1598

Abstract PDF PubReader ePub

Purpose
Smoking cessation intervention is one of the key components of successful lung cancer screening program. We investigated the effectiveness and related factors of smoking cessation services provided to the participants in a population-based lung cancer screening trial.
Materials and Methods
The Korean Lung Cancer Screening Project (K-LUCAS) is a nationwide, multi-center lung cancer screening trial that evaluates the feasibility of implementing population-based lung cancer screening. All 5,144 current smokers who participated in the K-LUCAS received a mandatory smoking cessation counseling. Changes in smoking status were followed up using a telephone survey in 6 months after lung cancer screening participation. The lung cancer screening’s impact on smoking cessation is analyzed by variations in the smoking cessation interventions provided in screening units.
Results
Among 4,136 survey responders, participant’s motivation to quit smoking increased by 9.4% on average after lung cancer screening. After 6 months from the initial screening, 24.3% of participants stopped smoking, and 10.6% of participants had not smoked continuously for at least 6 months after screening. Over 80% of quitters stated that participation in lung cancer screening motivated them to quit smoking. Low-cost public smoking cessation program combined with lung cancer screening increased the abstinence rates. The smokers were three times more likely to quit smoking when the smoking cessation counseling was provided simultaneously with low-dose computed tomography screening results than when provided separately.
Conclusion
A mandatory smoking cessation intervention integrated with screening result counselling by a physician after participation in lung cancer screening could be effective for increasing smoking cessation attempts.

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Factors Associated with Smoking Cessation of Participants in the National Lung Cancer Screening Program in Korea
Na-Young Yoon, Minji Seo, Nayoung Lee, Yeol Kim
Cancer Research and Treatment.2025; 57(4): 989. CrossRef
p53 Genetics and Biology in Lung Carcinomas: Insights, Implications and Clinical Applications
Dixan A. Benitez, Guadalupe Cumplido-Laso, Marcos Olivera-Gómez, Nuria Del Valle-Del Pino, Alba Díaz-Pizarro, Sonia Mulero-Navarro, Angel Román-García, Jose Maria Carvajal-Gonzalez
Biomedicines.2024; 12(7): 1453. CrossRef
Problems and Alternatives for Korea National Lung Cancer Screening Program for Smoking Cessation: Analysis of a Survey Involving Experts
Cheol Min Lee, Sil Vi Han Park, Jinri Kim, Bumjo Oh, Kiheon Lee, Yeol Kim, Yu-Jin Paek
Journal of the Korean Society for Research on Nicotine and Tobacco.2024; 15(2): 49. CrossRef
The pros and cons of lung cancer screening
Roberta Eufrasia Ledda, Georg-Christian Funk, Nicola Sverzellati
European Radiology.2024; 35(1): 267. CrossRef
Effective Smoking Cessation Counseling for Participants in a Lung Cancer Screening
Choon-Young Kim, Yeol Kim, Cheol Min Lee
Journal of the Korean Society for Research on Nicotine and Tobacco.2024; 15(3): 88. CrossRef

6,060 View
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Should We Perform Repeated Re-biopsy for the Detection of T790M Mutation?: Saerom Kim, Soo Han Kim, Jinmi Kim, Mi-Hyun Kim, Min Ki Lee, Jung Seop Eom; Cancer Res Treat. 2023;55(4):1190-1197. Published online April 17, 2023; DOI: https://doi.org/10.4143/crt.2023.320

Abstract PDF PubReader ePub

Purpose
Epidermal growth factor receptor (EGFR) T790M mutations have been detected in the second or third rebiopsy, even if the T790M mutation was not identified in the first rebiopsy. This meta-analysis investigated the EGFR T790M mutation detection rates and its additional advantages with repeated rebiopsies.
Materials and Methods
We searched through the PubMed and EMBASE databases up to June 2022. Studies reporting rebiopsy to identify the EGFR T790M mutation in case of disease progression among patients with advanced non-small cell lung cancer and multiple rebiopsies were included. The quality of the included studies was checked using the Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) tool.
Results
Eight studies meeting the eligibility criteria, reporting 1,031 EGFR mutation–positive patients were selected. The pooled EGFR T790M mutation detection rate of the first and repeated rebiopsies were 0.442 (95% confidence interval [CI], 0.411 to 0.473; I²=84%; p < 0.01) and 0.465 (95% CI, 0.400 to 0.530; I²=69%; p < 0.01), respectively. Overall, the pooled detection rate of EGFR T790M mutation was 0.545 (95% CI, 0.513 to 0.576), which increased by 10.3% with repeated rebiopsies.
Conclusion
This meta-analysis identified that repeated rebiopsy increases the detection rate of EGFR T790M mutation by 10.3%, even if EGFR T790M mutation is not detected in the first rebiopsy. Our results indicate that the spatiotemporal T790M heterogeneity can be overcome with repeated rebiopsy.

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Novel Bronchoscopy Method for Molecular Profiling of Lung Cancer: Targeted Washing Technique
Mi-Hyun Kim, Hayoung Seong, Hyojin Jang, Saerom Kim, Wanho Yoo, Soo Han Kim, Jeongha Mok, Kwangha Lee, Ki Uk Kim, Min Ki Lee, Jung Seop Eom
Cancer Research and Treatment.2026; 58(1): 107. CrossRef
Enhanced Detection of Druggable Mutations in Non–Small Cell Lung Cancer Using Targeted Collection of Bronchial Washing Fluid Compared With Plasma and Tumor Tissue
Mi-Hyun Kim, Soo Han Kim, Hayoung Seong, Jung Seop Eom
JCO Precision Oncology.2025;[Epub] CrossRef
A Multicenter Study on Unnecessary Rebiopsies in CT‐Guided Percutaneous Transthoracic Needle Biopsy of Pulmonary Lesions
Yangfan He, Huanhuan He, Yubo Cai, Shanshan Lyu, Zhengyi Zhou, Chengyou Zheng, Xinke Zhang, Jinling Duan, Jierong Chen, Jiewei Chen
Cancer Medicine.2025;[Epub] CrossRef
Clinical utility of repeated rebiopsy for EGFR T790M mutation detection in non-small cell lung cancer
Eun Hye Lee, Se Hyun Kwak, Kyeong Yeon Kim, Chi Young Kim, Sang Hoon Lee, Seok-Jae Heo, Yoon Soo Chang, Eun Young Kim
Frontiers in Oncology.2024;[Epub] CrossRef
Repeated rebiopsy for detection of EGFR T790M mutation in patients with advanced-stage lung adenocarcinoma: Associated factors and treatment outcomes of Osimertinib
Taeyun Kim, Junsu Choe, Sun Hye Shin, Byeong-Ho Jeong, Kyungjong Lee, Hojoong Kim, Se-Hoon Lee, Sang-Won Um, Hamidreza Montazeri Aliabadi
PLOS ONE.2024; 19(9): e0310079. CrossRef
Rebiopsie tumorale : quand ? pour qui ? pourquoi ? comment ?
V. Fallet
Revue des Maladies Respiratoires Actualités.2023; 15(2): 2S121. CrossRef

4,819 View
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Clinical Outcome of Stereotactic Body Radiotherapy in Patients with Early-Stage Lung Cancer with Ground-Glass Opacity Predominant Lesions: A Single Institution Experience: Jeong Yun Jang, Su Ssan Kim, Si Yeol Song, Young Seob Shin, Sei Won Lee, Wonjun Ji, Chang-Min Choi, Eun Kyung Choi; Cancer Res Treat. 2023;55(4):1181-1189. Published online March 21, 2023; DOI: https://doi.org/10.4143/crt.2022.1656

Abstract PDF Supplementary Material PubReader ePub

Purpose
The detection rate of early-stage lung cancer with ground-glass opacity (GGO) has increased, and stereotactic body radiotherapy (SBRT) has been suggested as an alternative to surgery in inoperable patients. However, reports on treatment results are limited. Therefore, we performed a retrospective study to investigate the clinical outcome after SBRT in patients with early-stage lung cancer with GGO-predominant tumor lesions at a single institution.
Materials and Methods
This study included 89 patients with 99 lesions who were treated with SBRT for lung cancer with GGO-predominant lesions that had a consolidation-to-tumor ratio of ≤0.5 at Asan Medical Center between July 2016 and July 2021. A median total dose of 56.0 Gy (range, 48.0–60.0) was delivered using 10.0–15.0 Gy per fraction.
Results
The overall follow-up period for the study was median 33.0 months (range, 9.9 to 65.9 months). There was 100% local control with no recurrences in any of the 99 treated lesions. Three patients had regional recurrences outside of the radiation field, and three had distant metastasis. The 1-year, 3-year, and 5-year overall survival rates were 100.0%, 91.6%, and 82.8%, respectively. Univariate analysis revealed that advanced age and a low level of diffusing capacity of the lungs for carbon monoxide were significantly associated with overall survival. There were no patients with grade ≥3 toxicity.
Conclusion
SBRT is a safe and effective treatment for patients with GGO-predominant lung cancer lesions and is likely to be considered as an alternative to surgery.

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Prognostic analysis of helical tomotherapy stereotactic body radiotherapy in multiple primary or second primary lung cancers
Jintao Ma, Xiaohong Xu, Wenhan Huang, Yong Hu, Gang Chen, Jian He
BMC Cancer.2025;[Epub] CrossRef
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Predictors of Post-chemoradiotherapy Pulmonary Complication in Locally Advanced Non–Small Cell Lung Cancer: Tae Hoon Lee, Byung-Hee Kang, Hak Jae Kim, Hong-Gyun Wu, Joo Ho Lee; Cancer Res Treat. 2023;55(3):865-874. Published online January 19, 2023; DOI: https://doi.org/10.4143/crt.2022.1538

Abstract PDF PubReader ePub

Purpose
We investigated the clinical effects and predictive factors of severe post-chemoradiotherapy pulmonary complications (PCPC) in locally advanced non–small cell lung cancer (LA-NSCLC).
Materials and Methods
Medical records of 317 patients who underwent definitive concurrent chemoradiation (CCRT) for LA-NSCLC were reviewed retrospectively. PCPC was defined as an event of admission or emergency department visit for acute or subacute pulmonary inflammatory complications, including pneumonitis and pneumonia, within 6 months after CCRT initiation. Patient characteristics, baseline lung function tests, radiation dosimetric parameters, and laboratory tests were analyzed to investigate their association with PCPC. Prognostic endpoints were disease progression rate (DPR) and overall survival (OS).
Results
PCPC was reported in 53 patients (16.7%). The OS of patients with PCPC was significantly worse (35.0% in 2 years) than that of patients without PCPC (67.0% in 2 years, p < 0.001). However, 2-year DPRs were 77.0% and 70.7% in patients with and without PCPC, respectively, which were not significantly different (p=0.087). In multivariate logistic regression, PCPC was independently associated with grade ≥ 1 hypoalbuminemia during CCRT (odds ratio [OR], 5.670; 95% confidence interval [CI], 2.487 to 13.40; p < 0.001), lower diffusing capacity of carbon monoxide (DLCO) (per mL/min/mmHg; OR, 0.855; 95% CI, 0.743 to 0.974; p=0.022), and higher lung V5 (per 10%; OR, 1.872; 95% CI, 1.336 to 2.699; p < 0.001).
Conclusion
PCPC might be a clinical endpoint to evaluate complications and predict the survival of patients subjected to CCRT for LA-NSCLC. Hypoalbuminaemia, DLCO, and lung V5 might predict PCPC in LA-NSCLC.

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European Respiratory Society and European Society of Thoracic Surgeons clinical practice guideline on fitness for curative intent treatment of lung cancer
Alessandro Brunelli, Georgia Hardavella, Rudolf M. Huber, Thierry Berghmans, Armin Frille, Maria Rodriguez, Ilona Tietzova, Lieven Depypere, Riccardo Asteggiano, Tim Batchelor, Adrien Costantini, Dirk De Ruysscher, Valerie Durieux, Corinne Faivre-Finn, Ma
European Respiratory Journal.2025; 66(5): 2500156. CrossRef
European Respiratory Society and European Society of Thoracic Surgeons clinical practice guideline on fitness for curative intent treatment of lung cancer
Alessandro Brunelli, Georgia Hardavella, Rudolf M Huber, Thierry Berghmans, Armin Frille, Maria Rodriguez, Ilona Tietzova, Lieven Depypere, Riccardo Asteggiano, Tim Batchelor, Adrien Costantini, Dirk De Ruysscher, Valerie Durieux, Corinne Faivre-Finn, Mar
European Journal of Cardio-Thoracic Surgery.2025;[Epub] CrossRef
Pneumonitis Risk After Chemoradiotherapy With and Without Immunotherapy in Patients With Locally Advanced Non-Small Cell Lung Cancer: A Systematic Review and Meta-Analysis
Chong Han, Jingping Qiu, Lu Bai, Tingting Liu, Jun Chen, He Wang, Jun Dang
International Journal of Radiation Oncology*Biology*Physics.2024; 119(4): 1179. CrossRef
Prognostic Biomarkers of Systemic Inflammation in Non-Small Cell Lung Cancer: A Narrative Review of Challenges and Opportunities
Mark Stares, Leo R. Brown, Dhruv Abhi, Iain Phillips
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Comparison of post-chemoradiotherapy pneumonitis between Asian and non-Asian patients with locally advanced non-small cell lung cancer: a systematic review and meta-analysis
Tingting Liu, Sihan Li, Silu Ding, Jingping Qiu, Chengbo Ren, Jun Chen, He Wang, Xiaoling Wang, Guang Li, Zheng He, Jun Dang
eClinicalMedicine.2023; 64: 102246. CrossRef

5,841 View
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The Incidence and Risk Factors of Chronic Pulmonary Infection after Radiotherapy in Patients with Lung Cancer: Yeonseok Choi, Jae Myoung Noh, Sun Hye Shin, Kyungjong Lee, Sang-Won Um, Hojoong Kim, Hongryull Pyo, Yong Chan Ahn, Byeong-Ho Jeong; Cancer Res Treat. 2023;55(3):804-813. Published online January 3, 2023; DOI: https://doi.org/10.4143/crt.2022.1305

Abstract PDF Supplementary Material PubReader ePub

Purpose
This study aimed to investigate cumulative incidence and risk factors associated with chronic pulmonary infection (CPI) development after radiotherapy for lung cancer.
Materials and Methods
We retrospectively analyzed 1,872 patients with lung cancer who received radiotherapy for lung cancer from 2010-2014, had a follow-up period of ≥ 3 months after radiotherapy, and did not have CPI at the time of radiotherapy. CPI was defined as pulmonary tuberculosis, non-tuberculous mycobacterial pulmonary disease, chronic pulmonary aspergillosis, or pulmonary actinomycosis. The cumulative incidence of CPI and overall survival (OS) were estimated using the Kaplan-Meier method, and a multivariable Cox proportional hazards analysis was performed to identify risk factors associated with CPI development.
Results
The median follow-up period was 2.3 years with OS rates of 55.6% and 37.6% at 2 and 5 years, respectively. CPI developed in 59 patients at a median of 1.8 years after radiotherapy, with cumulative incidence rates of 1.1%, 3.4%, 5.0%, and 6.8% at 1, 3, 5, and 7 years, respectively. A lower body mass index, interstitial lung disease, prior pulmonary tuberculosis, larger clinical target volume, history of lung cancer surgery or radiation pneumonitis, and use of inhaled corticosteroids were independent risk factors for CPI development.
Conclusion
The long-term survival rate of lung cancer patients receiving radiotherapy was not low, but the cumulative incidence of CPI gradually increased to 6.8% at 7 years after radiotherapy. Therefore, close monitoring of CPI development is required in surviving patients with risk factors.

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Chronic progressive pulmonary aspergillosis within the irradiated field after stereotactic body radiotherapy: two case reports
Nao Mamuro, Noriko Kishi, Yukinori Matsuo, Masahiro Yoneyama, Hiroyuki Inoo, Minoru Inoue, Takashi Mizowaki
International Cancer Conference Journal.2025; 14(2): 113. CrossRef
Predictive nomogram for risk of pulmonary infection in lung cancer patients undergoing radiochemotherapy: development and performance evaluation
Yujie Huang
American Journal of Cancer Research.2025; 15(2): 781. CrossRef
The Inter-Relationships Among the Risk Factors for Pulmonary Infection and the Diagnostic Utility of Inflammatory Markers in Patients with Non-Small Cell Lung Cancer
Wenwen Qin, Tiebin You, Tai Guo, Ruixin Tian, Xiaoman Cui, Ping Wang
Infection and Drug Resistance.2025; Volume 18: 1111. CrossRef
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Geling Teng, Feng Jin, Hua Zhang, Min Zhang
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Antonio-Andrei Cotea, Ancuta-Alina Constantin, Florin-Dumitru Mihaltan
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Invasive aspergillosis complicated in a patient with non-small cell lung cancer harboring RET fusion during treatment with RET-TKIs: a case report and literature review
Kaidiriye Setiwalidi, Yimeng Li, Yuyan Ma, Zhanpeng Hao, Yujia Zhao, Yuxin Zhang, Xuan Liang, Tao Tian, Zhiping Ruan, Yu Yao, Xiao Fu
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Optimal Definition of Oligometastasis Showing Survival Benefits of Local Therapies during Tyrosine Kinase Inhibitor Treatment: Yoon Jung Jang, Dong-gon Hyun, Wonjun Ji, Chang-Min Choi, Shinkyo Yoon, Dae Ho Lee, Sang-We Kim, Jae Cheol Lee; Cancer Res Treat. 2023;55(2):468-478. Published online November 28, 2022; DOI: https://doi.org/10.4143/crt.2022.1342

Abstract PDF Supplementary Material PubReader ePub

Purpose
We aimed to investigate the feasibility of four criteria on oligometastasis (OM) concerning clear survival benefits of local therapy (LT) during tyrosine kinase inhibitor (TKI) treatment in non–small cell lung cancer (NSCLC).
Materials and Methods
This single-center, retrospective study included patients with advanced NSCLC who received LT because of OM during TKI treatment at Asan Medical Center from January 2011 to December 2020. At the application of LT OM was classified according to four criteria: TNM, European Organization for Research and Treatment of Cancer Lung Cancer Group (EORTC-LCG), National Comprehensive Network (NCCN), and ORGAN. We compared survival outcomes between patients with and without OM.
Results
The median overall survival of the 117 patients included in the analysis was 70.8 months (95% confidence interval [CI], 56.6 to 85.1). The patients with OM meeting all four criteria (hazard ratio [HR] with 95% CI of TNM criteria 0.24 with 0.10-0.57; p=0.001, EORTC-LCG criteria 0.34 with 0.17-0.67; p=0.002, NCCN criteria 0.41 with 0.20-0.86; p=0.018 and ORGAN criteria 0.33 with 0.18-0.60; p < 0.001) had significantly longer survival compared with patients who did not after adjusting for confounding factors. Furthermore, increasing the number of extra-thoracic metastatic organs to two or more were independent predictive factors for worse survival outcomes (2 organs: HR, 3.51; 95% CI, 1.01 to 12.14; p=0.048; 3 organs: HR, 4.31; 95% CI, 0.94 to 19.73; p=0.060; 4 organs: HR, 24.47; 95% CI, 5.08 to 117.80; p < 0.001).
Conclusion
Patients with OM defined by all four criteria showed prognostic benefits from LT during TKI therapy.

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The patterns of systemic metastasis in major salivary gland cancer and therapeutic implications
Subi Oh, Younghac Kim, Hyojun Kim, Eunhye Kim, Sook-young Woo, Nayeon Choi, Junhun Cho, Dongryul Oh, Yong-Chan Ahn, Sehhoon Park, Myung-Ju Ahn, Han-Sin Jeong
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Real World Characteristics and Clinical Outcomes of HER2-Mutant Non–Small Cell Lung Cancer Patients Detected by Next-Generation Sequencing: Beung-Chul Ahn, Ye-Jeong Han, Hye Ryun Kim, Min Hee Hong, Byoung Chul Cho, Sun Min Lim; Cancer Res Treat. 2023;55(2):488-497. Published online November 9, 2022; DOI: https://doi.org/10.4143/crt.2022.359

Abstract PDF Supplementary Material PubReader ePub

Purpose
This study was conducted to investigate the clinical characteristics of patients with advanced non–small cell lung cancer (NSCLC) harboring human epidermal growth factor receptor 2 (HER2) mutations and to evaluate response to standard treatment and HER2-targeted agents.
Materials and Methods
Using tissue and/or blood next-generation sequencing, we identified 44 patients with NSCLC harboring HER2 mutations who were treated at Severance Hospital between December 2016 and February 2021. Clinical data, including patient characteristics, mutation status, incidence of metastasis for distant lesions, and response to chemotherapy, were retrospectively analyzed.
Results
The median age was 58 years, and 61% of the patients were female. Most patients (64%) were never-smokers. Adenocarcinoma was the most predominant subtype (98%). A total of 66% of the patients had extrathoracic metastatic lesions, and 32% had intracranial lesions at initial presentation. The median time to the development of brain metastasis was 15.6 months (range, 2.4 to 43.7). The most common type of HER2 mutation was 12 base pair in-frame insertion in exon 20, A775_G776insYVMA. Of the 44 patients, two had concomitant driver mutations, one with epidermal growth factor receptor (EGFR) mutation (V769M), and one with BRAF mutation (V600E). Patients treated with pemetrexed-based chemotherapy (75%) had an overall response rate (ORR) and progression-free survival (PFS) of 30% and 8.3 months (95% confidence interval [CI], 3.9 to 12.7), respectively. The ORR and PFS of HER2-targeted agent treated patients (14%) were 0.0% and 1.9 months (95% CI, 0.1 to 2.8), respectively.
Conclusion
Given its distinct characteristics and treatment responses, novel treatment strategies for HER2-mutant NSCLC should be developed promptly to improve survival outcomes of patients.

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Daniel Reinhorn, Mor Moskovitz, William D. Tap, Bob T. Li
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Yating Hou, Xingyang Xue, Zhuoyun Zhang, Dahai Mai, Wei Luo, Mingyu Zhou, Zichuan Liu, Yisheng Huang
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Qian Zhang, Yehao Yang, Mingying Xie, Zichao Zhou, Haicheng Wu, Wanchen Zhai, Yunfei Chen, Kaiyan Chen, Shichao Zhou, Hui Li, Yun Fan
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Pamela Trillo Aliaga, Gianluca Spitaleri, Ilaria Attili, Carla Corvaja, Elena Battaiotto, Panagiotis Agisilaos Angelopoulos, Ester Del Signore, Antonio Passaro, Filippo de Marinis
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Stefan Wölke, Behbood Sadrolhefazi, Habib Esmaeili, Sven Wind, Simone M. Blattner, Guanfa Gan, Dongmei Qiang, Andrea Schirmer, Fabian Müller
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Petros Christopoulos, Christin Assmann, Lirong Zhang, Kyle Dunton, Ahmed Ali, Mehmet Berktas, Lisa Delmastro, Alessandria Strübing, Yan Xiong, Sarah Lay-Flurrie, Pooja Hindocha, Tarana Mehdikhanova, Nicolas Girard
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The Additive Impact of Transbronchial Cryobiopsy Using a 1.1-mm Diameter Cryoprobe on Conventional Biopsy for Peripheral Lung Nodules: Soo Han Kim, Jeongha Mok, Eun-Jung Jo, Mi-Hyun Kim, Kwangha Lee, Ki Uk Kim, Hye-Kyung Park, Min Ki Lee, Jung Seop Eom; Cancer Res Treat. 2023;55(2):506-512. Published online November 1, 2022; DOI: https://doi.org/10.4143/crt.2022.1008

Abstract PDF Supplementary Material PubReader ePub

Purpose
The diagnostic yield of transbronchial biopsy (TBB) using radial probe endobronchial ultrasound (RP-EBUS) is 71%, which is lower than that of transthoracic needle biopsy. We investigated the performance and safety of sequential transbronchial cryobiopsy (TBC) using a novel 1.1-mm diameter cryoprobe, after conventional TBB using RP-EBUS for the diagnosis of peripheral lung lesions (PLLs).
Materials and Methods
From April 2021 to November 2021, 110 patients who underwent bronchoscopy using RP-EBUS for the diagnosis of PLL ≤ 30 mm were retrospectively included in our study. All records were followed until June 2022.
Results
The overall diagnostic yield of combined TBB and TBC was 79.1%, which was higher than 60.9% of TBB alone (p=0.005). The diagnostic yield of sequential TBC was 65.5%, which increased the overall diagnostic yield by 18.2%. The surface area of tissues by TBC (mean area, 18.5 mm²) was significantly larger than those of TBB by 1.5-mm forceps (3.4 mm², p < 0.001) and 1.9-mm forceps (3.7 mm², p=0.011). In the multivariate analysis, PLLs with the longest diameter of ≤ 22 mm were found to be related to additional diagnostic benefits from sequential TBC (odds ratio, 3.51; 95% confidence interval, 1.043 to 11.775; p=0.042). Complications were found in 10.5% of the patients: pneumothorax (1.0%), infection (1.0%), and significant bleeding (8.6%). None of the patients developed any life-threatening complications.
Conclusion
Sequential TBC with a 1.1-mm cryoprobe improved the performance of conventional TBB using RP-EBUS without serious complications.

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