Minsu Kang, Jeonghyun Kang, Changhoon Song, Heung-Kwon Oh, Hong Chung, Ilhak Lee, Jae Hung Jung, Jae Hyun Jeon, Eunjin Jeong, Jeong Rim Koh, Jung Hye Kwon, Jung-Yeon Choi, Kidong Kim, Kwangmin Kim, Kyung Hyun Moon, Minkyu Jung, Se Jin Hong, Su-Jin Koh, Sukki Cho, Suzy Kim, Yun-Gyoo Lee, Miyoung Choi, Dong Ah Park, Mi Ah Han, In Gyu Hwang, Jin Won Kim, Jee Hyun Kim
Received November 22, 2025 Accepted February 14, 2026 Published online February 19, 2026
The Korean Cancer Association’s clinical practice guidelines for geriatric oncology provide an evidence-based, multidisciplinary framework to optimize cancer care for the growing population of older adults. Geriatric Assessment (GA) identifies multidimensional vulnerabilities often missed by standard performance measures, providing critical information to guide individualized treatment planning. This guideline recommends using validated geriatric screening tools, life expectancy prediction models, and toxicity risk calculators to support risk stratification and decision-making. By integrating GA-based multidisciplinary interventions and shared decision-making into clinical practice, clinicians can avoid both overtreatment and undertreatment, reduce treatment-related toxicity, and potentially enhance quality of life. Although the certainty of evidence for most recommendations ranged from very low to low, the panel reached a consensus to provide conditional recommendations. This decision reflects the judgment that the clinical benefits—specifically in reducing treatment-related toxicity and identifying vulnerabilities—outweigh the limitations of current evidence, addressing the urgent need for standardized geriatric care in Korea. Ultimately, these guidelines aim to support individualized, patient-centered care and serve as a practical foundation for clinical and educational applications within the Korean healthcare system.
Purpose
The aim of this study was to identify subgroups of patients with pathologic N2 (pN2) non-small cell lung cancer (NSCLC) who may benefit from postoperative radiotherapy (PORT). Particular attention was given to evaluating whether extranodal extension (ENE) influences the therapeutic efficacy of PORT.
Materials and Methods
A total of 231 patients with pN2 NSCLC who underwent surgical resection followed by adjuvant chemotherapy at a single institution were analyzed retrospectively. Propensity score matching was performed to compare treatment outcomes according to the receipt of PORT.
Results
Propensity score matching yielded 99 matched pairs of patients with no significant differences in clinical parameters. There were no significant differences in the overall survival (OS; p=0.11) and disease-free survival (DFS; p=0.29) between the PORT and no PORT groups. However, PORT significantly improved the locoregional recurrence (LRR)-free rate (p=0.011), whereas the distant metastasis-free rate was comparable between groups (p=0.64). In subgroup analyses, PORT was associated with improved OS in patients with 1–3 positive N2 lymph nodes (p=0.013) and with significantly improved DFS among patients without ENE (p=0.046) or lymphatic invasion (p=0.032).
Conclusion
Although PORT did not improve OS or DFS in the matched overall cohort, it significantly reduced LRR. Subgroup analyses suggested potential benefits in patients with limited nodal burden and in those without ENE or lymphatic invasion. These findings, however, should be interpreted cautiously given small subgroup sizes and inherent limitations of retrospective design.
Purpose
Despite advances in treatment, lung cancer remains the leading cause of cancer mortality. This study aimed to characterise genome-wide tumorigenesis events and to understand the hypothesis of the multistep carcinogenesis of lung adenocarcinoma (LUAD)
Materials and Methods
We conducted multiregion whole-exome sequencing of LUAD with synchronous atypical adenomatous hyperplasia (AAH), adenocarcinoma in situ, or minimally invasive adenocarcinoma of 19 samples from three patients to characterize genome-wide tumorigenesis events and validate the hypothesis of the multistep carcinogenesis of LUAD. We identified potential pathogenic mutations preserved in preinvasive lesions and supplemented the finding by allelic variant level from RNA sequencing.
Results
Overall, independent mutational profiles were observed per patient and between patients. Some shared mutations including epidermal growth factor receptor (EGFR , p.L858R) were present across synchronous lesions.
Conclusion
Here, we show that there are driver gene mutations in AAH, and they may exacerbate as a sequence in a histological continuum, supporting the Darwinian evolution model of cancer genome. The intertumoral and intratumoral heterogeneity of synchronous LUAD implies that multi-biomarker strategies might be necessary for appropriate treatment.
Citations
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Gene Expression Profiles of Multiple Synchronous Lesions in Lung Adenocarcinoma Jisun Lim, Yeon Bi Han, Soo Young Park, Soyeon Ahn, Hyojin Kim, Hyun Jung Kwon, Choon-Taek Lee, Sukki Cho, Jin-Haeng Chung Cells.2021; 10(12): 3484. CrossRef
Hyung-Jun Kim, Jun Yeun Cho, Yeon Joo Lee, Jong Sun Park, Young-Jae Cho, Ho Il Yoon, Jin-Haeng Chung, Sukki Cho, Kwhanmien Kim, Kyung Won Lee, Jae Ho Lee, Choon-Taek Lee
Cancer Res Treat. 2019;51(4):1540-1548. Published online March 25, 2019
Purpose
Lung cancers presenting as subsolid nodule commonly have peripheral location, making the cancer-pleura relationship noteworthy. We aimed to evaluate the effect of pleural attachment and/or indentation on visceral pleural invasion (VPI) and recurrence-free survival.
Materials and Methods
Patients who underwent curative resection of lung cancer as subsolid nodules from April 2007 to January 2016 were retrospectively evaluated. They were divided into four groups according to their relationship with the pleura. Clinical, radiographical, and pathological findings were analyzed.
Results
Among 404 patients with malignant subsolid nodule, 120 (29.7%) had neither pleural attachment nor indentation, 26 (6.4%) had attachment only, 117 (29.0%) had indentation only, and 141 (34.9%) had both. VPI was observed in nodules of 36 patients (8.9%), but absent in nonsolid nodules and in those without pleural attachment and/or indentation. Compared to subsolid nodules with concurrent pleural attachment and indentation, those with attachment only (odds ratio, 0.12; 95% confidence interval [CI], 0.02 to 0.98) and indentation only (odds ratio, 0.10; 95% CI, 0.03 to 0.31) revealed lower odds of VPI. On subgroup analysis, the size of the solid portion was associated with VPI among those with pleural attachment and indentation (p=0.021). Such high-risk features for VPI were associated with earlier lung cancer recurrence (adjusted hazard ratio, 3.31; 95% CI, 1.58 to 6.91).
Conclusion
Concurrent pleural attachment and indentation are risk factors for VPI, and the odds increase with larger solid portion in subsolid nodules. Considering the risk of recurrence, early surgical resection could be encouraged in these patients.
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Se-Hoon Lee, Boram Lee, Joon Ho Shim, Kwang Woo Lee, Jae Won Yun, Sook-Young Kim, Tae-You Kim, Yeul Hong Kim, Young Hyeh Ko, Hyun Cheol Chung, Chang Sik Yu, Jeeyun Lee, Sun Young Rha, Tae Won Kim, Kyung Hae Jung, Seock-Ah Im, Hyeong-Gon Moon, Sukki Cho, Jin Hyoung Kang, Jihun Kim, Sang Kyum Kim, Han Suk Ryu, Sang Yun Ha, Jong Il Kim, Yeun-Jun Chung, Cheolmin Kim, Hyung-Lae Kim, Woong-Yang Park, Dong-Young Noh, Keunchil Park
Cancer Res Treat. 2019;51(1):211-222. Published online April 23, 2018
Purpose
With the emergence of next-generation sequencing (NGS) technology, profiling a wide range of genomic alterations has become a possibility resulting in improved implementation of targeted cancer therapy. In Asian populations, the prevalence and spectrum of clinically actionable genetic alterations has not yet been determined because of a lack of studies examining high-throughput cancer genomic data.
Materials and Methods
To address this issue, 1,071 tumor samples were collected from five major cancer institutes in Korea and analyzed using targeted NGS at a centralized laboratory. Samples were either fresh frozen or formalin-fixed, paraffin embedded (FFPE) and the quality and yield of extracted genomic DNA was assessed. In order to estimate the effect of sample condition on the quality of sequencing results, tissue preparation method, specimen type (resected or biopsied) and tissue storage time were compared.
Results
We detected 7,360 non-synonymous point mutations, 1,164 small insertions and deletions, 3,173 copy number alterations, and 462 structural variants. Fifty-four percent of tumors had one or more clinically relevant genetic mutation. The distribution of actionable variants was variable among different genes. Fresh frozen tissues, surgically resected specimens, and recently obtained specimens generated superior sequencing results over FFPE tissues, biopsied specimens, and tissues with long storage duration.
Conclusion
In order to overcome, challenges involved in bringing NGS testing into routine clinical use, a centralized laboratory model was designed that could improve the NGS workflows, provide appropriate turnaround times and control costs with goal of enabling precision medicine.
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Purpose
We conducted a retrospective analysis to determine if adjuvant chemotherapy prolongs overall survival in patients with pathologic stage IB lung adenocarcinoma who had undergone complete resection and were defined as high-risk by a newly developed recurrence risk scoring model.
Materials and Methods
Patientswho underwent curative resection for stage IB lung adenocarcinomawere analyzed with a newly developed recurrence risk scoring model and divided into a low-risk group and a high-risk group. The patients in the high-risk group were retrospectively divided into two groups based on whether they underwent adjuvant chemotherapy or observation. Recurrence-free survival and overall survival were compared between these two groups.
Results
A total of 328 patients who underwent curative resection between 2000 and 2009 were included in this study, of whom 110 (34%) received adjuvant chemotherapy and 218 (67%) underwent observation without additional treatment. According to our risk model, 167 patients (51%) were high-risk and 161 (49%) were low-risk. The 5-year recurrence-free survival rates and overall survival were 84.4% and 91.5% in low-risk patients and 53.9% and 74.7% in high-risk patients (p < 0.001). In high-risk patients, the 5-year overall survival rates were 77% among patients who underwent observation and 87% among those who underwent adjuvant chemotherapy (p=0.019).
Conclusion
Adjuvant chemotherapy prolonged overall survival among high-risk patients who had undergone complete resection for stage IB lung adenocarcinoma.
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Purpose Prognostic factors in patients with pulmonary metastases (PM) from colorectal cancer (CRC) are still controversial. This study assessed oncologic outcomes and prognostic factors in patients with metachronous PM from CRC.
Materials and Methods Between June 2003 and December 2011, 122 patients with CRC underwent curative resection of PM detected at least 4 months after CRC resection. Clinico-pathological factors selected from the prospectively maintained database were analyzed retrospectively.
Results The median disease-free interval (DFI) between resection of the primary tumor and detection of PM was 22.0 months (range, 4 to 85 months). Solitary PM were detected in 77 patients (63.1%), with a median maximal tumor diameter of 12.0 mm (range, 2 to 70 mm). Of 52 patients who underwent mediastinal lymph node (LN) dissection, eight patients had LN involvement. Five-year overall survival and disease-free survival (DFS) rates after initial pulmonary metastasectomy were 66.4% and 50.9%, respectively. DFI, mediastinal LN involvement, and the number and distribution of PM were significantly prognostic factors for DFS. In multivariable analysis DFI ≥ 12 months, solitary lesion, and absence of mediastinal LN involvement were independently prognostic for DFS. Of the 122 patients, 48 patients (39.3%) developed recurrent PM a median 13.0 months after initial pulmonary metastasectomy. Recurrent DFI was independently prognostic of DFS in patients who underwent repeated pulmonary metastasectomy.
Conclusion There is a potential survival benefit for patients with metachronous PM from CRC who undergo pulmonary metastasectomy, even those with recurrent PM. Pulmonary metastasectomy should be considered in selected patients, particularly those with longer DFI, solitary lesions, and absence of mediastinal LN involvement.
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