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26 "Dongryul Oh"
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Original Articles
Gastrointestinal cancer
Salvage Radiotherapy for Loco-regional Recurrence of Esophageal Cancer Following Surgery
Won Kyung Cho, Jae Myoung Noh, Dongryul Oh, Yong Chan Ahn, Jong-Mu Sun, Hong Kwan Kim, Young Mog Shim
Cancer Res Treat. 2025;57(1):165-173.   Published online July 26, 2024
DOI: https://doi.org/10.4143/crt.2024.191
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
There is few evidence regarding the optimal salvage treatment options for loco-reginal recurrence of esophageal cancer. This study aimed to evaluate the clinical outcomes of salvage radiotherapy (RT) in patients with loco-regional recurrence (LRR) after surgery for esophageal cancer.
Materials and Methods
We retrospectively reviewed 147 esophageal cancer patients who received salvage RT for loco-regional recurrence between 1996 and December 2019. A total dose of 60 Gy in 20 fractions was used for RT alone and 60-70 Gy in 30-35 fractions for concurrent chemoradiotherapy (CCRT).
Results
The patients’ median age was 65 years (range, 41 to 86 years). The median disease-free interval was 13.5 months (1.0 to 97.4 months). After a median 18.8 months follow-up, the 2-year overall survival (OS) and progression-free survival (PFS) rates were 38.1% and 25.9%, respectively. The median OS and PFS were 18.8 and 8.4 months, respectively. The CCRT could not improve OS compared to RT (p=0.336), but there was a trend of better PFS in the CCRT group. Regarding toxicities, the rate of grade 3 or higher toxicity was 10.9% occurring in 16 patients, and it was higher in patients who received CCRT than in the RT alone group (19.6% vs. 6.3%, p=0.023).
Conclusion
Salvage RT alone as well as CCRT could be effective in patients with locoregionally recurrent esophageal cancer.
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Hematologic malignancy
Assessment of Bone Marrow Involvement in Extranodal NK/T-Cell Lymphoma: Positron Emission Tomography versus Bone Marrow Biopsy, and the Significance of Minimal Involvement by EBV+ Cells (KROG 18-09)
Tae Hoon Lee, Hyun Ju Kim, Jong Hoon Lee, Jeongshim Lee, Jin Hee Kim, Dongryul Oh, Keun-Yong Eom
Cancer Res Treat. 2024;56(2):688-696.   Published online December 11, 2023
DOI: https://doi.org/10.4143/crt.2023.1049
AbstractAbstract PDFPubReaderePub
Purpose
This study aims to investigate the diagnostic significance of positron emission tomography/computed tomography (PET/CT) in assessing bone marrow (BM) involvement through a comparison of PET/CT findings with BM biopsy in extranodal natural killer/T-cell lymphoma.
Materials and Methods
The medical records of 193 patients were retrospectively reviewed. Patients were categorized as having early-stage (PET-ES) or advanced-stage (PET-AS) disease based on PET/CT results. The BM involvement was classified into three groups according to BM biopsy: gross BM involvement, minimal BM involvement (defined as the presence of a limited number of Epstein-Barr virus–positive cells in BM), and no involvement. Calculations of the accuracy of PET/CT in detecting BM involvement and analysis of the clinical outcomes (progression-free survival [PFS] and overall survival [OS]) according to the BM biopsy status were performed.
Results
PET/CT exhibited a sensitivity of 64.7% and a specificity of 96.0% in detecting gross BM involvement. For detecting any (both gross and minimal) BM involvement, the sensitivity was 30.4%, while the specificity was 99.0%. Only one patient (0.7%) demonstrated gross BM involvement among the PET-ES group. Survival outcomes of the PET-ES group with minimal BM involvement (3-year PFS, 55.6%; OS, 77.0%) were closer to those of the PET-ES group with no BM involvement (3-year PFS, 62.2%; OS, 80.6%) than to those of the PET-AS group (3-year PFS, 20.1%; OS, 29.9%).
Conclusion
PET/CT exhibits high specificity, but moderate and low sensitivity in detecting gross and minimal BM involvement, respectively. The clinical significance of minimal BM involvement for patients in the PET-ES group may be limited.
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Head and Neck cancer
Phase II Trial of Combined Durvalumab Plus Tremelimumab with Proton Therapy for Recurrent or Metastatic Head and Neck Squamous Cell Carcinoma
Hana Kim, Sehhoon Park, Hyun Ae Jung, Se-Hoon Lee, Keunchil Park, Yong Chan Ahn, Dongryul Oh, Myung-Ju Ahn
Cancer Res Treat. 2023;55(4):1104-1112.   Published online May 17, 2023
DOI: https://doi.org/10.4143/crt.2023.502
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
This phase II study investigated whether durvalumab/tremelimumab with proton therapy improves the objective response rate (ORR), overall survival (OS), and progression-free survival (PFS) in heavily treated recurrent or metastatic head and neck squamous cell carcinoma (HNSCC) patients.
Materials and Methods
Patients who previously received more than one chemotherapy, including at least one platinum-based regimen, and who had at least two measurable lesions were enrolled. Patients received 1,500 mg durvalumab intravenously combined with 75 mg tremelimumab intravenously every 4 weeks for four cycles followed by 1,500 mg durvalumab every 4 weeks. After one cycle of the durvalumab/tremelimumab treatment, proton therapy was given with a total dose of 25 Gy in 5 Gy daily fractions to one of the measurable lesions. We also assessed the ORR in the target lesion outside the radiation field to evaluate the abscopal effect.
Results
Thirty-one patients were enrolled between March 2018 and July 2020. With 8.6 months of follow-up, the ORR was 22.6% (7/31), including one complete response and six partial responses. The median OS was 8.4 months (95% confidence interval [CI], 2.5 to 14.3) and the median PFS was 2.4 months (95% CI, 0.6 to 4.2). Among the 23 evaluable patients who completed proton therapy, the ORR was 30.4% (7/23). The median OS was 11.1 months (95% CI, 6.5 to 15.8), and the median PFS was 3.7 months (95% CI, 1.6 to 5.7). Grade 3 or higher adverse events were observed in six patients (19.4%) as follows: anemia (n=1), constipation (n=1), electrolyte imbalances (n=2), hyperglycemia (n=1), and pneumonia (n=1).
Conclusion
The combination of durvalumab/tremelimuab with proton therapy was tolerated well and had encouraging anti-tumor efficacy in non-irradiated tumor lesions of heavily treated HNSCC patients.

Citations

Citations to this article as recorded by  
  • Abscopal effect in maxillary sinus cancer: Insights from two case reports and a literature review
    Akihiro Sakai, Koji Ebisumoto, Hiroaki Iijima, Mayu Yamauchi, Daisuke Maki, Tsuyoshi Fukuzawa, Kenji Okami
    Cancer Reports.2024;[Epub]     CrossRef
  • Solid tumours showing oligoprogression to immune checkpoint inhibitors have the potential for abscopal effects
    Makoto Ito, Souichiro Abe, Sou Adachi, Yukihiko Oshima, Arisa Takeuchi, Wataru Ohashi, Takashi Iwata, Tetsuya Ogawa, Akiko Ota, Yasuaki Kubota, Takahito Okuda, Kojiro Suzuki
    Japanese Journal of Radiology.2024; 42(4): 424.     CrossRef
  • Durvalumab with or without tremelimumab for patients with recurrent or metastatic squamous cell carcinoma of the head and neck: a systematic review and meta-analysis
    Xiao Han, Haidong Zhang, Kai Sun, Jing Li, Wanjuan Wu, Kai Liu, Zhenkun Yu
    Frontiers in Immunology.2024;[Epub]     CrossRef
  • Kaplan lecture 2023: lymphopenia in particle therapy
    Marco Durante
    International Journal of Radiation Biology.2024; 100(5): 669.     CrossRef
  • Clinical application of high‐LET radiotherapy combined with immunotherapy in malignant tumors
    Kexin Meng, Haijun Lu
    Precision Radiation Oncology.2024; 8(1): 42.     CrossRef
  • Research progress of immunotherapy for advanced head and neck cancer
    Anchi Sun, Zhiwei Xing, Rongrong Lv, Pengyuan Niu, Bao Zhao, Shiyin Ma, Hui Li
    Medical Oncology.2024;[Epub]     CrossRef
  • A review and bibliometric analysis of global research on proton radiotherapy
    Ge Song, Zhi Zheng, Yingming Zhu, Yaoting Wang, Song Xue
    Medicine.2024; 103(19): e38089.     CrossRef
  • Cutaneous Squamous Cell Carcinoma: An Updated Review
    Rina Jiang, Mike Fritz, Syril Keena T. Que
    Cancers.2024; 16(10): 1800.     CrossRef
  • Radiotherapy and immunology
    Liangliang Wang, Connor Lynch, Sean P. Pitroda, András Piffkó, Kaiting Yang, Amy K. Huser, Hua Laura Liang, Ralph R. Weichselbaum
    Journal of Experimental Medicine.2024;[Epub]     CrossRef
  • The Evolving Paradigm of Immunotherapy in Head-and-neck Squamous Cell Cancers
    Riccardo Gili, Paolo Bossi
    Journal of Head & Neck Physicians and Surgeons.2024; 12(1): 13.     CrossRef
  • Neoadjuvant Immunotherapy in Head and Neck Cancers: A Paradigm Shift in Treatment Approach
    Alessia Zotta, Maria Luisa Marciano, Francesco Sabbatino, Alessandro Ottaiano, Marco Cascella, Monica Pontone, Massimo Montano, Ester Calogero, Francesco Longo, Morena Fasano, Teresa Troiani, Fortunato Ciardiello, Fabiana Raffaella Rampetta, Giovanni Salz
    Biomedicines.2024; 12(10): 2337.     CrossRef
  • Emerging Radiotherapy Technologies for Head and Neck Squamous Cell Carcinoma: Challenges and Opportunities in the Era of Immunotherapy
    Carmen Kut, Harry Quon, Xuguang Scott Chen
    Cancers.2024; 16(24): 4150.     CrossRef
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Outcomes of Salvage Therapy for Oropharyngeal Cancer Recurrence Following Upfront Radiation Therapy and Prognostic Factors
Nayeon Choi, Hack Jung Kim, Heejun Yi, Heejung Kim, Tae Hwan Kim, Han-Sin Jeong, Young-Ik Son, Chung-Hwan Baek, Dongryul Oh, Yong Chan Ahn, Man Ki Chung
Cancer Res Treat. 2023;55(4):1123-1133.   Published online May 8, 2023
DOI: https://doi.org/10.4143/crt.2022.1046
AbstractAbstract PDFPubReaderePub
Purpose
This study aimed to investigate the oncologic outcomes and prognostic factors of salvage treatments in patients with recurrent oropharyngeal squamous cell carcinoma (OPSCC) after radiotherapy (RT)-based treatment.
Materials and Methods
A cancer registry was used to retrieve the records of 337 patients treated with definitive RT or concurrent chemoradiotherapy (CRT) from 2008 to 2018 at a single institution. The poor-responder group (PRG) was defined as patients with residual or recurrent disease after primary treatment, and the oncologic outcomes for each salvage treatment method were analyzed. In addition, prognostic indicators of recurrence-free survival (RFS) and overall survival (OS) were identified in patients who underwent salvage treatment.
Results
After initial (C)RT, the PRG comprised 71 of the 337 patients (21.1%): 18 patients had residual disease, and 53 had recurrence after primary treatment (mean time to recurrence 19.5 months). Of these, 63 patients received salvage treatment (surgery 57.2%, re-(C)RT 23.8%, and chemotherapy 19.0%), and the salvage success rate was 47.6% at the last follow-up. The overall 2-year OS for salvage treatments was 56.4% (60.8% for the salvage surgery group and 46.2% for the salvage re-(C)RT). Salvage surgery patients with negative resection margins had better oncologic outcomes than those with close/positive resection margins. Using multivariate analyses, locoregional recurrence and residual disease after primary surgery were associated with poor outcome after salvage treatment. In Kaplan-Meier analyses, p16 status was significantly associated with OS in the initial treatment setting but not in the salvage setting.
Conclusion
In recurrent OPSCC after RT-based treatment, successful salvage was achieved in 56.4% patients who had undergone salvage surgery and radiation treatment. Salvage treatment methods should be selected carefully, given recurrence site as a prognostic factor for RFS.

Citations

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  • Toxicities and prognostic factors in elderly HPV‐associated oropharyngeal cancer patients treated with radiotherapy or chemoradiotherapy
    Erkan Topkan, Efsun Somay, Ugur Selek
    Journal of Medical Virology.2024;[Epub]     CrossRef
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General
Validation of the Korean Version of the Patient-Reported Outcomes Measurement Information System 29 Profile V2.1 among Cancer Survivors
Danbee Kang, Youngha Kim, Jihyun Lim, Junghee Yoon, Sooyeon Kim, Eunjee Kang, Heesu Nam, Sungkeun Shim, Mangyeong Lee, Haesook Bok, Sang-Won Lee, Soo-Yong Shin, Jin Seok Ahn, Dongryul Oh, Juhee Cho
Cancer Res Treat. 2022;54(1):10-19.   Published online April 9, 2021
DOI: https://doi.org/10.4143/crt.2020.1200
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
The purpose of the study was to validate the Korean version of Patient-Reported Outcomes Measurement Information System 29 Profile v2.1 (K-PROMIS-29 V2.1) among cancer survivors.
Materials and Methods
Participants were recruited from outpatient clinics of the Comprehensive Cancer Center at the Samsung Medical Center in Seoul, South Korea, from September to October 2018. Participants completed a survey questionnaire that included the K-PROMIS-29 V2.1 and the European Organisation for Research and Treatment of Cancer Quality of Life Core Questionnaire (EORTC QLQ-C30). Principal component analysis and confirmatory factor analysis (CFA) and Pearson’s correlations were used to evaluate the reliability and validity of the K-PROMIS-29 V2.1.
Results
The mean age of the study participants was 54.4 years, the mean time since diagnosis was 1.2 (±2.4) years, and 349 (87.3%) completed the entire questionnaire. The Cronbach’s alpha coefficients of the seven domains in the K-PROMIS-29 V2.1 ranged from 0.81 to 0.96, indicating satisfactory internal consistency. In the CFA, the goodness-of-fit indices for the K-PROMIS-29 V2.1 were high (comparative fit index, 0.91 and standardized root-mean-squared residual, 0.06). High to moderate correlations were found between comparable subscales of the K-PROMIS-29 V2.1 and subscales of the EORTC QLQ-C30 (r=0.52-0.73).
Conclusion
The K-PROMIS-29 V2.1 is a reliable and valid measure for assessing the health-related quality of life domains in a cancer population, thus supporting their use in studies and oncology trials.

Citations

Citations to this article as recorded by  
  • Path analysis of illness uncertainty and psychosocial adaptation of patients with Marfan syndrome
    Sujin Kim, Yeonsoo Jang, JiYeon Choi, Kijun Song, Jae-kwan Song, Mona Choi
    European Journal of Cardiovascular Nursing.2024; 23(2): 197.     CrossRef
  • A single-armed proof-of-concept study of Lymfit: A personalized, virtual exercise intervention to improve health outcomes in lymphoma survivors in the pandemic
    Christopher Angelillo, Wing Lam Tock, Matthew Salaciak, Ryan E. R. Reid, Ross E. Andersen, Christine Maheu, Nathalie A. Johnson, Miquel Vall-llosera Camps
    PLOS ONE.2024; 19(1): e0275038.     CrossRef
  • Psychometric validation of the Functional Assessment of Cancer Therapy‐Endometrial among endometrial cancer patients
    Sooyeon Kim, Joseph J. Noh, Youngha Kim, Juhee Cho, Danbee Kang, Yoo‐Young Lee
    Cancer Medicine.2024;[Epub]     CrossRef
  • Hungarian PROMIS-29+2: psychometric properties and population reference values
    Balázs Jenei, Alex Bató, Ariel Z. Mitev, Valentin Brodszky, Fanni Rencz
    Quality of Life Research.2023; 32(8): 2179.     CrossRef
  • Preliminary evaluation of the Chinese version of the patient-reported outcomes measurement information system 29-item profile in patients with aortic dissection
    Wanbing Huang, Qiansheng Wu, Yufen Zhang, Chong Tian, Haishan Huang, Sufang Huang, Yanrong Zhou, Jing He, Hui Wang
    Health and Quality of Life Outcomes.2022;[Epub]     CrossRef
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    Youngha Kim, Danbee Kang, Eunjee Kang, Jihyun Lim, Sooyeon Kim, Heesu Nam, Sungkeun Shim, Mangyeong Lee, Young-Wan Moon, Seung-Jae Lim, Ki-Sun Sung, Juhee Cho
    BMC Sports Science, Medicine and Rehabilitation.2021;[Epub]     CrossRef
  • 7,904 View
  • 249 Download
  • 8 Web of Science
  • 6 Crossref
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Hematologic malignancy
Increased Risk of Diabetes after Definitive Radiotherapy in Patients with Indolent Gastroduodenal Lymphoma
Jong Yun Baek, Do Hoon Lim, Dongryul Oh, Heerim Nam, Jae J Kim, Jun Haeng Lee, Byung-Hoon Min, Hyuk Lee
Cancer Res Treat. 2022;54(1):294-300.   Published online April 1, 2021
DOI: https://doi.org/10.4143/crt.2021.073
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
This study aimed to evaluate the effect of radiotherapy (RT) on the risk of diabetes by assessing hemoglobin A1c (HbA1c) levels in patients with gastroduodenal indolent lymphoma.
Materials and Methods
This retrospective study included patients with stage I extranodal marginal zone lymphoma of the mucosa-associated lymphoid tissue or follicular lymphoma of the gastroduodenal region who were treated with Helicobacter pylori eradication and/or RT between 2000 and 2019 in our institution. Of total 79 patients with HbA1c test, 17 patients received RT (RT group), while 62 patients did not receive RT (control group). A diabetes-associated event (DAE) was defined as a ≥ 0.5% increase in HbA1c levels from baseline, and diabetes event (DE) were defined as HbA1c level of ≥ 6.5%.
Results
During the median follow-up of 49 months, no local failure occurred after RT and no patients died of lymphoma. The RT group had significantly higher risk for DAEs on univariable analysis (hazard ratio [HR], 4.18; 95% confidence interval [CI], 1.64 to 10.66; p < 0.01) and multivariable analysis (HR, 3.68; 95% CI, 1.42 to 9.56; p=0.01). Further, the DE risk was significantly higher in the RT group than in the control group (HR, 4.32; 95% CI, 1.08 to 17.30; p=0.04) and in patients with increased baseline HbA1c levels (HR, 35.83; 95% CI, 2.80 to 459.19; p=0.01). On multivariable analysis, RT significantly increased the risk of DEs (HR, 4.55; 95% CI, 1.08 to 19.19; p=0.04), even after adjusting baseline HbA1c level (HR, 40.97; 95% CI, 3.06 to 548.01; p=0.01).
Conclusion
Patients who received RT for gastroduodenal indolent lymphoma had an increased risk of diabetes compared to those who did not.

Citations

Citations to this article as recorded by  
  • CHARACTERISTICS OF ENDOCRINE COMPONENT OF PANCREAS AFTER ADMINISTRATION OF N-ACETYLCYSTEINE IN THE MODEL OF ACUTE RADIATION-INDUCED PANCREATITIS
    Grigoriy Aleksandrovich Demyashkin, Dali Ibragimovna Ugurchieva, Vladislav Andreevich Yakimenko, Matvey Anatol'evich Vadyukhin
    Ulyanovsk Medico-biological Journal.2024; (2): 166.     CrossRef
  • ASSESSMENT OF THE INFLAMMATORY RESPONSE IN THE PANCREAS AFTER ADMINISTRATION OF N-ACETYL CYSTEINE IN A MODEL OF POST-RADIATION PANCREATITIS
    G.A. Demyashkin, D.A. Atyakshin, D.I. Ugurchieva, V.A. Yakimenko, M.A. Vadyukhin, S.N. Koryakin
    Molekulyarnaya Meditsina (Molecular medicine).2024; : 58.     CrossRef
  • Lactobacillus gasseriCKCC1913 mediated modulation of the gut–liver axis alleviated insulin resistance and liver damage induced by type 2 diabetes
    Shuaiming Jiang, Aijie Liu, Wenyao Ma, Xinlei Liu, Pengfei Luo, Meng Zhan, Xiaoli Zhou, Lihao Chen, Jiachao Zhang
    Food & Function.2023; 14(18): 8504.     CrossRef
  • Consumption of ultra-processed foods and risk of multimorbidity of cancer and cardiometabolic diseases: a multinational cohort study
    Reynalda Cordova, Vivian Viallon, Emma Fontvieille, Laia Peruchet-Noray, Anna Jansana, Karl-Heinz Wagner, Cecilie Kyrø, Anne Tjønneland, Verena Katzke, Rashmita Bajracharya, Matthias B. Schulze, Giovanna Masala, Sabina Sieri, Salvatore Panico, Fulvio Ricc
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  • Risk of Diabetes Mellitus after Radiotherapy for Gastric Mucosa-Associated Lymphoid Tissue Lymphoma
    Joongyo Lee, Hong In Yoon, Jihun Kim, Jaeho Cho, Kyung Hwan Kim, Chang-Ok Suh
    Cancers.2022; 14(17): 4110.     CrossRef
  • 6,563 View
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  • 2 Web of Science
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Head and Neck cancer
Re-irradiation with Moderate Hypo-fractionation Using Intensity Modulated Photon or Proton Radiation Therapy in Locally Recurrent Squamous Cell Carcinoma of Nasopharynx
Heerim Nam, Yong Chan Ahn, Kyungmi Yang, Dongryul Oh, Jae Myoung Noh
Cancer Res Treat. 2022;54(1):96-108.   Published online March 26, 2021
DOI: https://doi.org/10.4143/crt.2020.1349
AbstractAbstract PDFPubReaderePub
Purpose
This study aimed to analyze the treatment outcomes of locally recurrent nasopharyngeal cancer (NPC) patients following moderate hypo-fractionation re-irradiation (re-RT).
Materials and Methods
Sixty locally recurrent NPC patients underwent hypo-fractionation re-RT. Forty-eight point three percentage had rT3-4, and 30.0% did keratinizing squamous cell carcinoma. Intensity-modulated radiation therapy (IMRT), with or without intensity-modulated proton therapy (IMPT), was used in 66.7% of patients.
Results
With the median follow-up of 22 months (range, 2 to 254 months), 31 patients (51.7%) died, 38 (63.3%) developed further treatment failure, and 30 (50.0%) developed ≥ grade 3 toxicity (including seven grade 5) at time of analysis. The 2- and 5-year rates of overall survival, local failure-free survival, and ≥ grade 3 toxicity-free survival were 57.9% and 45.8%, 64.1% and 52.5%, and 54.8% and 44.9%, respectively. In multivariate analyses, worse factors for overall survival (OS) were iT3-4 (p=0.010) and age at re-RT ≥ 53 years (p=0.003), those for local failure-free survival (LFFS) were rT3-4 (p=0.022) and rN0-1 (p=0.035), and those for toxicity-free survival (TFS) were iT3-4 (p=0.020) and re-IMRT/IMPT (p=0.030), respectively. Cumulative dose or fraction size ≥ 3 Gy at re-RT, however, showed no significance for OS, LFFS and TFS.
Conclusion
Current re-RT with modern RT techniques by moderate hypo-fractionation scheme seemed feasible in treating locally recurrent NPC patients.

Citations

Citations to this article as recorded by  
  • Radiation oncology for the rhinologist
    Helena Levyn, Fan Yang, Nancy Y. Lee
    Current Opinion in Otolaryngology & Head & Neck Surgery.2024; 32(1): 5.     CrossRef
  • Identifying the prognostic value of MRI-based tumor response and predicting the risk of radio-resistance in re-radiotherapy for locally recurrent nasopharyngeal carcinoma
    Zi-Jian Lu, Ting Liu, Jie-Yi Lin, Sheng-Ting Pei, Ling Guo, Sai-Lan Liu, Hai-Qiang Mai
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    Alexandre Santos, Scott Penfold, Peter Gorayski, Hien Le
    Cancers.2022; 14(9): 2271.     CrossRef
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    Xingzhe Li, Sarin Kitpanit, Anna Lee, Dennis Mah, Kevin Sine, Eric J. Sherman, Lara A. Dunn, Loren S. Michel, James Fetten, Kaveh Zakeri, Yao Yu, Linda Chen, Jung Julie Kang, Daphna Y. Gelblum, Sean M. McBride, Chiaojung J. Tsai, Nadeem Riaz, Nancy Y. Lee
    JAMA Network Open.2021; 4(6): e2113205.     CrossRef
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Oncological and Functional Outcomes of Larynx-preserving Surgery for Hypopharyngeal Cancer: A Comparison with Definitive Radiation-based Treatment
Donghyeok Kim, Nalee Kim, Sungmin Koh, Man Ki Chung, Young-Ik Son, Dongryul Oh, Han-Sin Jeong, Yong Chan Ahn
Cancer Res Treat. 2022;54(1):84-95.   Published online March 26, 2021
DOI: https://doi.org/10.4143/crt.2020.1197
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
Larynx-preserving surgery (LPS) have recently gained popularity and achieved comparable oncologic outcomes to conventional radical surgery for localized hypopharyngeal cancer (HPC). In the current study, the role of LPS has been assessed thoroughly in comparison with upfront radiation therapy (RT).
Materials and Methods
We retrospectively reviewed 185 candidates for LPS with cT1-2 disease; 59 patients underwent upfront LPS while 126 patients received upfront RT, respectively. Oncological and functional outcomes were investigated and compared.
Results
Following LPS, safe margin (≥ 5 mm) was achieved in 37.3% of patients. Overall, better clinical outcomes at 5 years were achieved following upfront LPS than those following upfront RT: overall survival (OS) (72.7% vs. 59.0%, p=0.045), disease-free survival (DFS) (59.8% vs. 45.0%, p=0.039), and functional laryngeal preservation (100% vs. 89.7%, p=0.010). Although similar outcomes were observed in patients with cT1 disease, better 5-year DFS was achieved following upfront LPS in patients with cT2 disease (57.0% vs. 36.4%, p=0.023) by virtue of better local control. Despite frequent cN2-3 disease in upfront LPS group, comparable outcomes were observed between upfront RT and LPS group. However, multivariable analyses revealed that performance status and double primary cancer diagnosed within 6 months of HPC diagnosis affected OS significantly, while treatment modality per se did not.
Conclusion
Although upfront LPS could provide better local control than upfront RT in patients with cT2 disease, overall outcomes were comparable following either modality. Treatment selection of larynx-preserving approach for HPC should be individualized based on tumor and patient factors.

Citations

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  • In Reply to Liu and Luo
    Kangpyo Kim, Yong Chan Ahn
    International Journal of Radiation Oncology*Biology*Physics.2024; 118(1): 308.     CrossRef
  • The role and clinical significance of microRNA-29a-3p in the development of hypopharyngeal carcinoma
    Tao Liu, Detao Ding, Wei Wang, Yungang Wu, Dengdian Ma, Miaomiao Liu, Ziqiao Tan, Jing Yao, Xiaoyu Li
    Brazilian Journal of Otorhinolaryngology.2023; 89(3): 401.     CrossRef
  • Survival and swallowing function outcome impact factors analysis of surgery-oriented comprehensive treatment for hypopharyngeal cancer in a series of 122 patients
    Wan-Xin Li, Yan-Bo Dong, Cheng Lu, Patrick J. Bradley, Liang-Fa Liu
    Ear, Nose & Throat Journal.2022; 101(8): 532.     CrossRef
  • 7,135 View
  • 163 Download
  • 4 Web of Science
  • 3 Crossref
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Head/neck cancer
Development of a Tongue Immobilization Device Using a 3D Printer for Intensity Modulated Radiation Therapy of Nasopharyngeal Cancer Patients
Sang Gyu Ju, Yong Chan Ahn, Yeong-bi Kim, Seung Gyu Park, Yoo-mi Choi, Cho Hee Na, Chae-Seon Hong, Dongryul Oh, Dong Yeol Kwon, Cheol Chong Kim, Dong Hyeon Kim
Cancer Res Treat. 2021;53(1):45-54.   Published online September 15, 2020
DOI: https://doi.org/10.4143/crt.2020.572
AbstractAbstract PDFPubReaderePub
Purpose
This study aimed to reduce radiation doses to the tongue, a patient-specific semi-customized tongue immobilization device (SCTID) was developed using a 3D printer for helical tomotherapy (HT) of nasopharyngeal cancer (NPCa). Dosimetric characteristics and setup stability of the SCTID were compared with those of a standard mouthpiece (SMP).
Materials and Methods
For displacement and robust immobilization of the tongue, the SCTID consists of four parts: upper and lower tooth stoppers, tongue guider, tongue-tip position guide bar, and connectors. With the SCTID and SMP, two sets of planning computed tomography and HT plans were obtained for 10 NPCa patients. Dosimetric and geometric characteristics were compared. Position reproducibility of the tongue with SCTID was evaluated by comparing with planned dose and adaptive accumulated dose of the tongue and base of the tongue based on daily setup mega-voltage computed tomography.
Results
Using the SCTID, the tongue was effectively displaced from the planning target volume compared to the SMP. The median mucosa of the tongue (M-tongue) dose was significantly reduced (20.7 Gy vs. 27.8 Gy). The volumes of the M-tongue receiving a dose of 15 Gy, 30 Gy, and 45 Gy and the volumes of the mucosa of oral cavity and oropharynx (M-OC/OP) receiving a dose of 45 Gy and 60 Gy were significantly lower than using the SMP. No significant differences was observed between the planned dose and the accumulated adaptive dose in any dosimetric characteristics of the tongue and base of tongue.
Conclusion
SCTID can not only reduce the dose to the M-tongue and M-OC/OP dramatically, when compared to SMP, but also provide excellent reproducibility and easy visual verification.

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Feasibility of Selective Neck Irradiation with Lower Elective Radiation Dose in Treating Nasopharynx Cancer Patients
Won Kyung Cho, Dongryul Oh, Eonju Lee, Tae Gyu Kim, Hyebin Lee, Heerim Nam, Jae Myoung Noh, Yong Chan Ahn
Cancer Res Treat. 2019;51(2):603-610.   Published online July 18, 2018
DOI: https://doi.org/10.4143/crt.2018.240
AbstractAbstract PDFPubReaderePub
Purpose
This study aimed to report the clinical outcomes following selective neck irradiation (SNI) with lower elective radiation therapy (RT) dose in treating nasopharyngeal cancer (NPC) patients.
Materials and Methods
A total of 347 NPC patients received definitive RT according to our SNI policy and were retrospectively analyzed. The clinical target volumes (CTVs) were subdivided into CTV at high risk (CTV-HR) and CTV at low risk (CTV-LR). The typical doses to gross tumor volume (GTV), CTV-HR, and CTV-LR were 68.4-70.0 Gy, 54.0-60.0 Gy, and 36.0 Gy.
Results
With the median follow-up of 68.1 months (range, 2.3 to 197.1 months), the 5-year rates of loco-regional control and progression-free survival in all the patients were 85.0% and 70.8%, respectively. Thirty patients developed regional failure and the regional control rates at 3 and 5 years were 92.6% and 91.4%, respectively. The sites of regional failure in relation to the target volume were exclusively inside GTV/CTV-HR in 20, inside and outside GTV/CTVHR in three, and exclusively outside GTV/CTV-HR in seven, which were 5.7%, 0.9%, and 2.0% of total patients, respectively.
Conclusion
The clinical outcomes by the current SNI policy were feasible and comparable to those following classic elective nodal irradiation policy.

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Radiation Therapy Outcome and Clinical Features of Duodenal-Type Follicular Lymphoma
Hansang Lee, Dongryul Oh, Kyungmi Yang, Young Hyeh Ko, Yong Chan Ahn, Won Seog Kim, Seok Jin Kim
Cancer Res Treat. 2019;51(2):547-555.   Published online July 10, 2018
DOI: https://doi.org/10.4143/crt.2018.190
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
Duodenal-type follicular lymphoma (FL) is a rare variant of FL. There is still no consensus on the initial treatment, and clinical features including endoscopic findings are not familiar to most physicians. The objective of this study was to evaluate the outcome of patients who were initially treated with radiation therapy for duodenal-type FL.
Materials and Methods
We retrospectively analyzed 20 patients who were consecutively diagnosed with duodenaltype FL between 2008 and 2017. All patients received radiation therapywith curative intent.
Results
The median age of the patients was 52 years (range, 26 to 66 years), and females were predominant. Most patients (n=18, 90%) had stage I disease, and were diagnosed by a regular health examination in an asymptomatic state. The histological grade was one in 19 patients (95%), and the endoscopic findings were diffuse nodular (n=8), whitish granular (n=8), and mixed pattern (n=4). Radiation therapy was delivered to 17 patients with 24 Gy in 12 fractions, and to three patients with 30.6-36 Gy in 18 fractions. All patients were evaluated with endoscopy for response to radiation therapy, and complete response was achieved in 19 patients (95%). At the time of analysis, all patients survived without any evidence of late toxicities related with radiation therapy.
Conclusion
Taken together, radiation therapy alone could be effective in controlling duodenal lesion. A further study with longer follow-up duration is warranted to confirm our findings.

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    Guilherme Duffles, Arthur Braga, Talita Silveira, Yana Novis, Celso Arrais, Luciana Tucunduva, Ana Rita Fonseca, Davimar Borducchi, Pedro Neffa, Fernando Blumm, Marianne de Castro Gonçalves, Frederico Moreira, Fabio Nucci, Eduardo Rego, Vanderson Rocha
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    Judith A. Ferry
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    Masuho Saburi, Yoshiyuki Kondo, Masao Ogata, Yasuhiro Soga, Miyuki Abe, Kuniko Takano, Kazuhiro Kohno, Takayuki Nagai, Toshiyuki Nakayama
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The Effect of Hospital Case Volume on Clinical Outcomes in Patients with Nasopharyngeal Carcinoma: A Multi-institutional Retrospective Analysis (KROG-1106)
Boram Ha, Kwan Ho Cho, Sung Ho Moon, Chang-Geol Lee, Ki Chang Keum, Yeon-Sil Kim, Hong-Gyun Wu, Jin Ho Kim, Yong Chan Ahn, Dongryul Oh, Jae Myoung Noh, Jong Hoon Lee, Sung Hwan Kim, Won Taek Kim, Young-Taek Oh, Min Kyu Kang, Jin Hee Kim, Ji-Yoon Kim, Moon-June Cho, Chul Seoung Kay, Jin Hwa Choi
Cancer Res Treat. 2019;51(1):12-23.   Published online February 5, 2018
DOI: https://doi.org/10.4143/crt.2017.273
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
The purpose of this study was to investigate the effect of hospital case volume on clinical outcomes in patients with nasopharyngeal carcinoma (NPC).
Materials and Methods
Data on 1,073 patients with cT1-4N0-3M0 NPC were collected from a multi-institutional retrospective database (KROG 11-06). All patients received definitive radiotherapy (RT) either with three-dimensional-conformal RT (3D-CRT) (n=576) or intensity-modulated RT (IMRT) (n=497). The patients were divided into two groups treated at high volume institution (HVI) (n=750) and low volume institution (LVI) (n=323), defined as patient volume ≥ 10 (median, 13; range, 10 to 18) and < 10 patients per year (median, 3; range, 2 to 6), respectively. Endpoints were overall survival (OS) and loco-regional progression-free survival (LRPFS).
Results
At a median follow-up of 56.7 months, the outcomes were significantly better in those treated at HVI than at LVI. For the 614 patients of propensity score-matched cohort, 5-year OS and LRPFS were consistently higher in the HVI group than in the LVI group (OS: 78.4% vs. 62.7%, p < 0.001; LRPFS: 86.2% vs. 65.8%, p < 0.001, respectively). According to RT modality, significant difference in 5-year OS was observed in patients receiving 3D-CRT (78.7% for HVI vs. 58.9% for LVI, p < 0.001) and not in those receiving IMRT (77.3% for HVI vs. 75.5% for LVI, p=0.170).
Conclusion
A significant relationship was observed between HVI and LVI for the clinical outcomes of patients with NPC. However, the difference in outcome becomes insignificant in the IMRT era, probably due to the standardization of practice by education.

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    Wenyan Yao, Jiang Hu, Peixun Xu, Mengxue He, Yongwen Fang, Mingzhi Liu, Zongtai Li, Huilang He, Hui Liu, Wenzhao Sun, Senkui Xu
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Low-Dose Radiation Therapy for Primary Conjunctival Marginal Zone B-Cell Lymphoma
Ga-In Lee, Dongryul Oh, Won Seog Kim, Seok Jin Kim, Young Hyeh Ko, Kyung In Woo, Yoon-Duck Kim, Yong Chan Ahn
Cancer Res Treat. 2018;50(2):575-581.   Published online June 16, 2017
DOI: https://doi.org/10.4143/crt.2017.182
AbstractAbstract PDFPubReaderePub
Purpose
The purpose of this study was to evaluate the clinical features and the long-term outcomes of primary conjunctival marginal zone B-cell lymphoma (MZBCL) patients who were treated with radiation therapy (RT).
Materials and Methods
Retrospective data of 79 patients with 121 primary conjunctival MZBCL lesions were collected from January 1, 2001 till June 30, 2014. All lesions were treated by local RT (26 Gy) with patient-specific customized lens-shielding device.
Results
The current Korean patients’ cohort showed younger median age at diagnosis (38 years), great female preponderance (78.5%) and more frequent bilateral involvement (53.2%) than the previous studies. Following 26 Gy’s RT, excellent clinical outcomes were achieved: 5-year rates of overall survival, local relapse-free survival, and contralateral relapse-free survival were 100%, 98.1%, and 91.5%, respectively. Two patients (2.5%) developed local relapse and five (6.3%) developed relapse at initially uninvolved contralateral conjunctiva with median interval of 52.9 months, and late adverse events of grade 2 and 3 occurred in seven (8.8%) and two (2.5%) patients, respectively.
Conclusion
26 Gy’s RT was highly effective and safe, with the use of lens-shielding device, in treating patients with primary conjunctival MZBCL.

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Comparison of the Clinical Outcomes of Patients with Squamous Cell Carcinoma of the Tonsil Receiving Postoperative Ipsilateral Versus Bilateral Neck Radiotherapy: A Propensity Score Matching Analysis (KROG 11-07)
Youngkyong Kim, Kwan Ho Cho, Sung Ho Moon, Chang Geol Lee, Ki Chang Keum, Sang-wook Lee, Yong Chan Ahn, Dongryul Oh, Yeon-Sil Kim, Yong Kyun Won, Hong-Gyun Wu, J. Hun Hah, Young-Taek Oh
Cancer Res Treat. 2017;49(4):1097-1105.   Published online February 9, 2017
DOI: https://doi.org/10.4143/crt.2016.425
AbstractAbstract PDFPubReaderePub
Purpose
The impact of postoperative ipsilateral neck radiotherapy (INRT) versus bilateral neck radiotherapy (BNRT) on the clinical outcomes of patients with tonsillar squamous cell carcinoma was analyzed retrospectively.
Materials and Methods
Between October 2001 and June 2012, 241 patients with T1-2 and N0-N2b tonsillar carcinoma from 16 institutes underwent postoperative INRT (n=84) or BNRT (n=157) following a tonsillectomy. Seventy patientswere identified from each group by propensity score matching and compared in terms of the overall survival (OS), disease-free survival (DFS), locoregional relapse-free survival (LRRFS), and distant metastasis-free survival (DMFS) rates calculated using the Kaplan-Meier method with a log-rank test.
Results
The median follow-up was 55 months (range, 3 to 133 months). The survival outcomes in the INRT and BNRT groupswere similar: 5-year OS (92.8% vs. 94.0%, p=0.985), DFS (80.5% vs. 94.2%. p=0.085), LRRFS (88.1% vs. 97.1%, p=0.083), and DMFS (92.7% vs. 97.0%, p=0.370). Subgroup analysis revealed no contralateral neck recurrence in 61 patients with T1-2N0-2a regardless of the treatment groups. For 79 patients with N2b, contralateral neck recurrence was more common in the INRT group than in the BNRT group (7.9% vs. 0.0%), but the difference was not significant (p=0.107). The overall grade ≥ 2 toxicities were lower in the INRT group: acute (45.7% vs. 74.3%, p=0.001) and late (4.3% vs. 31.4%, p < 0.001), respectively.
Conclusion
INRT is an attractive strategy for patients with T1-2N0-2a tonsillar carcinoma compared to BNRT. For patients with N2b, there was a small risk of contralateral neck recurrence when treated with INRT, but its impact on the OS was limited with successful salvage treatment.

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Role of Adjuvant Thoracic Radiation Therapy and Full Dose Chemotherapy in pN2 Non-small Cell Lung Cancer: Elucidation Based on Single Institute Experience
Hyojung Park, Dongryul Oh, Yong Chan Ahn, Hongryull Pyo, Jae Myung Noh, Jong-Mu Sun, Jin Seok Ahn, Myung-Ju Ahn, Keunchil Park, Hong Kwan Kim, Yong Soo Choi, Jhingook Kim, Jae Ill Zo, Young Mog Shim
Cancer Res Treat. 2017;49(4):880-889.   Published online December 12, 2016
DOI: https://doi.org/10.4143/crt.2016.442
AbstractAbstract PDFPubReaderePub
Purpose
The optimal adjuvant therapy modality for treating pN2 non-small cell lung cancer patients has not yet been established. In this study, the authors investigated clinical outcomes following three different adjuvant therapy modalities.
Materials and Methods
From January 2006 to December 2012, 240 patients with cN0/1 disease were found to have pN2 disease following curative resection and received one of three adjuvant therapy modalities:thoracic radiation therapy (TRT) and concurrent chemotherapy (CTx) (CCRT) (group I), CCRT plus consolidation CTx (group II), and CTx alone (group III). TRT was delivered to 155 patients (groups I/II), and full dose CTxwas delivered to 172 patients either as a consolidative or a sole modality (group II/III).
Results
During 30 months of median follow-up, 44 patients died and 141 developed recurrence. The 5-year overall survival (OS), locoregional control (LRC), distant metastasis-free survival (DMFS), and disease-free survival (DFS) rates of all patients were 76.2%, 80.7%, 36.4%, and 29.6%, respectively. There was no difference in OS among groups. TRT (groups I/II) significantly improved LRC, full dose CTx (groups II/III) did DMFS, and CCRT plus consolidation CTx (group II) did DFS, respectively.
Conclusion
The current study could support that TRT could improve LRC and full dose CTx could improve DMFS and that CCRT plus consolidation CTx could improve DFS.

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    Dailong Li, Wanqiang Li, Yaqi Pang, Lu Xu, Xinhua Xu
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Radiation Therapy Alone in cT1-3N0 Non-small Cell Lung Cancer Patients Who Are Unfit for Surgical Resection or Stereotactic Radiation Therapy: Comparison of Risk-Adaptive Dose Schedules
Won Kyung Cho, Jae Myoung Noh, Yong Chan Ahn, Dongryul Oh, Hongryull Pyo
Cancer Res Treat. 2016;48(4):1187-1195.   Published online March 9, 2016
DOI: https://doi.org/10.4143/crt.2015.391
AbstractAbstract PDFPubReaderePub
Purpose
High dose definitive radiation therapy (RT) alone is recommended to patients with cT1-3N0 non-small cell lung cancer, who are unfit for surgery or stereotactic RT. This study was conducted to evaluate the clinical outcomes and cost-effectiveness following RT alone using two different modest hypofractionation dose schemes. Materials and Methods Between 2001 and 2014, 124 patients underwent RT alone. From 2001 till 2010, 60 Gy in 20 fractions was delivered to 79 patients (group 1). Since 2011, 60 Gy in 20 fractions (group 2, 20 patients), and 60 Gy in 15 fractions (group 3, 25 patients) were selectively chosen depending on estimated risk of esophagitis.
Results
At follow-up of 16.7 months, 2-year rates of local control, progression-free survival, and overall survival were 62.6%, 39.1%, and 59.1%, respectively. Overall survival was significantly better in group 3 (p=0.002). In multivariate analyses, cT3 was the most powerful adverse factor affecting clinical outcomes. Incidence and severity of radiation pneumonitis were not different among groups, while no patients developed grade 2 esophagitis in group 3 (p=0.003). Under current Korean Health Insurance Policy, RT cost per person was 22.5% less in group 3 compared with others. Conclusion The current study demonstrated that 60 Gy in 15 fractions instead of 60 Gy in 20 fractions resulted in comparable clinical outcomes with excellent safety, direct cost saving, and improved convenience to the patients with tumors located at ≥ 1.5 cm from the esophagus.

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    Monica-Emilia Chirilă, Ivica Ratosa, Gustavo Nader Marta, Philip Poortmans
    Journal of Medical and Radiation Oncology.2021; 1(1): 83.     CrossRef
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    Prasenjit Chatterjee, Jibak Bhattacharya, Tanmay Ghosh, Biplap Sarkar, Monica-Emilia Chirilă, Sushmita Roy Chowdhury, Syamasis Bandyopadhyay, Jayaprakash Agarwal
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    C. Faivre-Finn, J.D. Fenwick, K.N. Franks, S. Harrow, M.Q.F. Hatton, C. Hiley, J.J. McAleese, F. McDonald, J. O'Hare, C. Peedell, T. Pope, C. Powell, R. Rulach, E. Toy
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Erratum
ERRATUM: Role of Chemotherapy in Stage II Nasopharyngeal Carcinoma Treated with Curative Radiotherapy
Min Kyu Kang, Dongryul Oh, Kwan Ho Cho, Sung Ho Moon, Hong-Gyun Wu, Dae-Seog Heo, Yong Chan Ahn, Keunchil Park, Hyo Jung Park, Jun Su Park, Ki Chang Keum, Jihye Cha, Jun Won Kim, Yeon-Sil Kim, Jin Hyoung Kang, Young-Taek Oh, Ji-Yoon Kim, Sung Hwan Kim, Jin-Hee Kim, Chang Geol Lee
Cancer Res Treat. 2016;48(1):425-425.   Published online January 10, 2016
DOI: https://doi.org/10.4143/crt.2014.141.2
Corrects: Cancer Res Treat 2015;47(4):871
PDFPubReaderePub
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Original Articles
The Role of Neoadjuvant Chemotherapy in the Treatment of Nasopharyngeal Carcinoma: A Multi-institutional Retrospective Study (KROG 11-06) Using Propensity Score Matching Analysis
Jin Ho Song, Hong-Gyun Wu, Bhum Suk Keam, Jeong Hun Hah, Yong Chan Ahn, Dongryul Oh, Jae Myoung Noh, Hyo Jung Park, Chang Geol Lee, Ki Chang Keum, Jihye Cha, Kwan Ho Cho, Sung Ho Moon, Ji-Yoon Kim, Woong-Ki Chung, Young Taek Oh, Won Taek Kim, Moon-June Cho, Chul Seung Kay, Yeon-Sil Kim
Cancer Res Treat. 2016;48(3):917-927.   Published online December 28, 2015
DOI: https://doi.org/10.4143/crt.2015.265
AbstractAbstract PDFPubReaderePub
Purpose
We compared the treatment results and toxicity in nasopharyngeal carcinoma (NPC) patients treated with concurrent chemotherapy (CCRT) alone (the CRT arm) or neoadjuvant chemotherapy followed by CCRT (the NCT arm). Materials and Methods A multi-institutional retrospective study was conducted to review NPC patterns of care and treatment outcome. Data of 568 NPC patients treated by CCRT alone or by neoadjuvant chemotherapy followed by CCRT were collected from 15 institutions. Patients in both treatment arms were matched using the propensity score matching method, and the clinical outcomes were analyzed.
Results
After matching, 300 patients (150 patients in each group) were selected for analysis. Higher 5-year locoregional failure-free survival was observed in the CRT arm (85% vs. 72%, p=0.014). No significant differences in distant failure-free survival (DFFS), disease-free survival (DFS), and overall survival were observed between groups. In subgroup analysis, the NCT arm showed superior DFFS and DFS in stage IV patients younger than 60 years. No significant difference in compliance and toxicity was observed between groups, except the radiation therapy duration was slightly shorter in the CRT arm (50.0 days vs. 53.9 days, p=0.018). Conclusion This study did not show the superiority of NCT followed by CCRT over CCRT alone. Because NCT could increase the risk of locoregional recurrences, it can only be considered in selected young patients with advanced stage IV disease. The role of NCT remains to be defined and should not be viewed as the standard of care.

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Tumor Volume Reduction Rate during Adaptive Radiation Therapy as a Prognosticator for Nasopharyngeal Cancer
Hyebin Lee, Yong Chan Ahn, Dongryul Oh, Heerim Nam, Jae Myoung Noh, Su Yeon Park
Cancer Res Treat. 2016;48(2):537-545.   Published online July 14, 2015
DOI: https://doi.org/10.4143/crt.2015.081
AbstractAbstract PDFPubReaderePub
Purpose
The purpose of this study is to evaluate the prognostic significance of the tumor volume reduction rate (TVRR) measured during adaptive definitive radiation therapy (RT) for nasopharyngeal cancer (NPC).
Materials and Methods
We reviewed the RT records of 159 NPC patients treated with definitive RT with or without concurrent chemotherapy between January 2006 and February 2013. Adaptive re-planning was performed in all patients at the third week of RT. The pre- and mid-RT gross tumor volumes (GTVs) of the primary tumor and the metastatic lymph nodes were measured and analyzed for prognostic implications.
Results
After a median follow-up period of 41.5 months (range, 11.2 to 91.8 months) for survivors, there were 43 treatment failures. The overall survival and progression-free survival (PFS) rates at 5 years were 89.6% and 69.7%, respectively. The mean pre-RT GTV, mid-RT GTV, and TVRR were 45.9 cm3 (range, 1.5 to 185.3 cm3), 26.7 cm3 (1.0 to 113.8 cm3), and –41.9% (range, –87% to 78%), respectively. Patients without recurrence had higher TVRR than those with recurrence (44.3% in the no recurrence group vs. 34.0% in the recurrence group, p=0.004), and those with TVRR > 35% achieved a significantly higher rate of PFS at 5 years (79.2% in TVRR > 35% vs. 53.2% in TVRR ≤ 35%; p < 0.001). In multivariate analysis, TVRR was a significant factor affecting PFS (hazard ratio, 2.877; 95% confidence interval, 1.555 to 5.326; p=0.001).
Conclusion
TVRR proved to be a significant prognostic factor in NPC patients treated with definitive RT, and could be used as a potential indicator for early therapeutic modification during the RT course.

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Carotid-Sparing TomoHelical 3-Dimensional Conformal Radiotherapy for Early Glottic Cancer
Chae-Seon Hong, Dongryul Oh, Sang Gyu Ju, Yong Chan Ahn, Jae Myoung Noh, Kwangzoo Chung, Jin Sung Kim, Tae-Suk Suh
Cancer Res Treat. 2016;48(1):63-70.   Published online March 6, 2015
DOI: https://doi.org/10.4143/crt.2014.265
AbstractAbstract PDFPubReaderePub
Purpose
The purpose of this study was to investigate the dosimetric benefits and treatment efficiency of carotid-sparing TomoHelical 3-dimensional conformal radiotherapy (TH-3DCRT) for early glottic cancer. Materials and Methods Ten early-stage (T1N0M0) glottic squamous cell carcinoma patients were simulated, based on computed tomography scans. Two-field 3DCRT (2F-3DCRT), 3-field intensity-modulated radiation therapy (3F-IMRT), TomoHelical-IMRT (TH-IMRT), and TH-3DCRT plans were generated with a 67.5-Gy total prescription dose to the planning target volume (PTV) for each patient. In order to evaluate the plan quality, dosimetric characteristics were compared in terms of conformity index (CI) and homogeneity index (HI) for PTV, dose to the carotid arteries, and maximum dose to the spinal cord. Treatment planning and delivery times were compared to evaluate treatment efficiency.
Results
The median CI was substantially better for the 3F-IMRT (0.65), TH-IMRT (0.64), and TH-3DCRT (0.63) plans, compared to the 2F-3DCRT plan (0.32). PTV HI was slightly better for TH-3DCRT and TH-IMRT (1.05) compared to 2F-3DCRT (1.06) and 3F-IMRT (1.09). TH-3DCRT, 3F-IMRT, and TH-IMRT showed an excellent carotid sparing capability compared to 2F-3DCRT (p < 0.05). For all plans, the maximum dose to the spinal cord was < 45 Gy. The median treatment planning times for 2F-3DCRT (5.85 minutes) and TH-3DCRT (7.10 minutes) were much lower than those for 3F-IMRT (45.48 minutes) and TH-IMRT (35.30 minutes). The delivery times for 2F-3DCRT (2.06 minutes) and 3F-IMRT (2.48 minutes) were slightly lower than those for TH-IMRT (2.90 minutes) and TH-3DCRT (2.86 minutes). Conclusion TH-3DCRT showed excellent carotid-sparing capability, while offering high efficiency and maintaining good PTV coverage.

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Role of Chemotherapy in Stage II Nasopharyngeal Carcinoma Treated with Curative Radiotherapy
Min Kyu Kang, Dongryul Oh, Kwan Ho Cho, Sung Ho Moon, Hong-Gyun Wu, Dae-Seog Heo, Yong Chan Ahn, Keunchil Park, Hyo Jung Park, Jun Su Park, Ki Chang Keum, Jihye Cha, Jun Won Kim, Yeon-Sil Kim, Jin Hyoung Kang, Young-Taek Oh, Ji-Yoon Kim, Sung Hwan Kim, Jin-Hee Kim, Chang Geol Lee
Cancer Res Treat. 2015;47(4):871-878.   Published online February 13, 2015
DOI: https://doi.org/10.4143/crt.2014.141
Correction in: Cancer Res Treat 2016;48(1):425
AbstractAbstract PDFPubReaderePub
Purpose
To define the role of neoadjuvant and concurrent chemotherapy in stage II nasopharyngeal carcinoma, we compared the treatment outcomes of patients treated with curative radiotherapy with or without chemotherapy. Materials and Methods From 2004 to 2011, 138 patients with American Joint Committee on Cancer (AJCC) 2002 stage II nasopharyngeal carcinoma were treated with curative radiotherapy in 12 hospitals in South Korea. Treatment methods included radiotherapy alone in 34 patients, neoadjuvant chemotherapy followed by radiotherapy alone in seven, concurrent chemoradiotherapy in 80, and neoadjuvant chemotherapy followed by concurrent chemoradiotherapy in 17. Adjuvant chemotherapy was used in 42 patients. Total radiation dose ranged from 64 Gy to 74.2 Gy (median, 70 Gy).
Results
Median follow-up was 48 months (range, 7 to 97 months) for all patients. At the last followup, 13 patients had died and 32 had experienced treatment failure; locoregional failure occurred in 14, distant failure in 16, and both in two. Five-year locoregional relapse-free survival, distant metastasis-free survival, progression-free survival, and overall survival were 86.2%, 85.5%, 74.4%, and 88.2%, respectively. Multivariate analyses showed that the significant prognostic factors were concurrent chemotherapy and N stage for locoregional relapse-free survival, concurrent chemotherapy for progression-free survival, and age and N stage for overall survival. Neither neoadjuvant nor concurrent chemotherapy improved distant metastasis-free survival. Conclusion Concurrent chemotherapy significantly improved 5-year locoregional relapse-free survival and progression-free survival in stage II nasopharyngeal carcinoma. However, neoadjuvant chemotherapy failed to improve either.

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Definitive Bimodality Concurrent Chemoradiotherapy in Patients with Inoperable N2-positive Stage IIIA Non-small Cell Lung Cancer
Jae Myoung Noh, Yong Chan Ahn, Hyebin Lee, Hongryull Pyo, BoKyong Kim, Dongryul Oh, Hyojung Park, Eonju Lee, Keunchil Park, Jin Seok Ahn, Myung-Ju Ahn, Jong-Mu Sun
Cancer Res Treat. 2015;47(4):645-652.   Published online February 12, 2015
DOI: https://doi.org/10.4143/crt.2014.144
AbstractAbstract PDFPubReaderePub
Purpose
This study was conducted to evaluate the treatment outcomes following definitive bimodality concurrent chemoradiotherapy (CCRT) in patients with inoperable N2-positive stage IIIA (N2- IIIA) non-small cell lung cancer (NSCLC). Materials and Methods From May 1997 to December 2012, 65 out of 633 patients with N2-IIIA NSCLC received bimodality therapy. The treatment modality was selected during/after neoadjuvant CCRT in 21 patients or primarily at diagnosis in 44 through a multidisciplinary consensus meeting. The median age was 65 years (range, 36 to 76 years). Sixty patients (92.3%) had clinically evident N2 disease, while 22 (33.8%) had multi-station N2 involvement. The median radiation therapy dose was 66 Gy in 33 fractions, while the dose was elevated to 72 Gy in 13 patients who had a treatment break due to delayed decision regarding resectability. The most frequent chemotherapy regimen was weekly paclitaxel or docetaxel plus cisplatin or carboplatin (54, 83.1%).
Results
During the median follow-up of 18.8 months (range, 1.6 to 173.1 months), 34 patients (52.3%) experienced disease progression, with distant metastasis being the most common first treatment failure pattern (23, 34.8%). The median and 2-year rates of progression-free survival were 18.8 months and 45.9%, respectively. The median and 2-year rates of overall survival were 28.6 months and 50.1%, respectively. Conclusion Definitive bimodality therapy in patients with N2-IIIA NSCLC demonstrated favorable outcomes, while trimodality therapy could be considered for candidates for less than pneumonectomy.

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    Junghee Lee, Hong Kwan Kim, Byung Jo Park, Jong Ho Cho, Yong Soo Choi, Jae Ill Zo, Young Mog Shim, Hongryull Pyo, Yong Chan Ahn, Jin Seok Ahn, Myung-Ju Ahn, Keunchil Park, Jhingook Kim
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Effect of Radiation Therapy Techniques on Outcome in N3-positive IIIB Non-small Cell Lung Cancer Treated with Concurrent Chemoradiotherapy
Jae Myoung Noh, Jin Man Kim, Yong Chan Ahn, Hongryull Pyo, BoKyong Kim, Dongryul Oh, Sang Gyu Ju, Jin Sung Kim, Jung Suk Shin, Chae-Seon Hong, Hyojung Park, Eonju Lee
Cancer Res Treat. 2016;48(1):106-114.   Published online February 12, 2015
DOI: https://doi.org/10.4143/crt.2014.131
AbstractAbstract PDFPubReaderePub
Purpose
This study was conducted to evaluate clinical outcomes following definitive concurrent chemoradiotherapy (CCRT) for patients with N3-positive stage IIIB (N3-IIIB) non-small cell lung cancer (NSCLC), with a focus on radiation therapy (RT) techniques. Materials and Methods From May 2010 to November 2012, 77 patients with N3-IIIB NSCLC received definitive CCRT (median, 66 Gy). RT techniques were selected individually based on estimated lung toxicity, with 3-dimensional conformal RT (3D-CRT) and intensity-modulated RT (IMRT) delivered to 48 (62.3%) and 29 (37.7%) patients, respectively. Weekly docetaxel/paclitaxel plus cisplatin (67, 87.0%) was the most common concurrent chemotherapy regimen.
Results
The median age and clinical target volume (CTV) were 60 years and 288.0 cm3, respectively. Patients receiving IMRT had greater disease extent in terms of supraclavicular lymph node (SCN) involvement and CTV ≥ 300 cm3. The median follow-up time was 21.7 months. Fortyfive patients (58.4%) experienced disease progression, most frequently distant metastasis (39, 50.6%). In-field locoregional control, progression-free survival (PFS), and overall survival (OS) rates at 2 years were 87.9%, 38.7%, and 75.2%, respectively. Although locoregional control was similar between RT techniques, patients receiving IMRT had worse PFS and OS, and SCN metastases from the lower lobe primary tumor and CTV ≥ 300 cm3were associated with worse OS. The incidence and severity of toxicities did not differ significantly between RT techniques. Conclusion IMRT could lead to similar locoregional control and toxicity, while encompassing a greater disease extent than 3D-CRT. The decision to apply IMRT should be made carefully after considering oncologic outcomes associated with greater disease extent and cost.

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Potential Role of Adjuvant Radiation Therapy in Cervical Thymic Neoplasm Involving Thyroid Gland or Neck
Jae Myoung Noh, Sang Yun Ha, Yong Chan Ahn, Dongryul Oh, Seung Won Seol, Young Lyun Oh, Joungho Han
Cancer Res Treat. 2015;47(3):436-440.   Published online November 17, 2014
DOI: https://doi.org/10.4143/crt.2013.184
AbstractAbstract PDFPubReaderePub
Purpose
The purpose of this study is to assess the clinicopathologic features, treatment outcomes, and role of adjuvant radiation therapy (RT) in cervical thymic neoplasm involving the thyroid gland or neck. Materials and Methods The medical and pathologic records of eight patients with cervical thymic neoplasm were reviewed retrospectively. All patients underwent surgical resection, including thyroidectomy or mass excision. Adjuvant RT was added in five patients with adverse clinicopathologic features. The radiation doses ranged from 54 Gy/27 fractions to 66 Gy/30 fractions delivered to the primary tumor bed and pathologically involved regional lymphatics using a 3-dimensional conformal technique. Results Eight cases of cervical thymic neoplasm included three patients with carcinoma showing thymus-like differentiation (CASTLE) and five with ectopic cervical thymoma. The histologic subtypes of ectopic cervical thymoma patients were World Health Organization (WHO) type B3 thymoma in one, WHO type B1 thymoma in two, WHO type AB thymoma in one, and metaplastic thymoma in one, respectively. The median age was 57 years (range, 40 to 76 years). Five patients received adjuvant RT: three with CASTLE; one with WHO type B3; and one with WHO type AB with local invasiveness. After a median follow-up period of 49 months (range, 11 to 203 months), no recurrence had been observed, regardless of adjuvant RT. Conclusion Adjuvant RT after surgical resection might be worthwhile in patients with CASTLE and ectopic cervical thymoma with WHO type B2-C and/or extraparenchymal extension, as similarly indicated for primary thymic epithelial tumors. A longer follow-up period may be needed in order to validate this strategy.

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    Maryam Vajihinejad, Ali Ataei, Mohammad Pashmchi, Ali Aledavoud, Vahid Zand, Mohammad Ali Broomand, Mohammad Mohammadi, Niloofar Zare Reshkuiyeh
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    Nikitha Kairanna, Geetha Vasudevan, Veena Karanth, Krishna Sharan
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    Lin Jiang, Wei‐Hui Zheng, Chao Chen
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    Mihaela Stanciu, Ruxandra Paula Ristea, Mihaela Popescu, Corina Maria Vasile, Florina Ligia Popa
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    Diana Mellisa Dualim, Loo Guo Hou, Shahrun Niza Abdullah Suhaimi, Nani Harlina Md Latar, Rohaizak Muhammad, Nordashima Abd Shukor
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    A. Marx, T. Rüdiger, E. Rößner, A. Tzankov, V. T. de Montpréville, R. R. Rieker, P. Ströbel, C.‑A. Weis
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Changes in Arterioportal Shunts in Hepatocellular Carcinoma Patients with Portal Vein Thrombosis Who Were Treated with Chemoembolization Followed by Radiotherapy
Dongryul Oh, Sung Wook Shin, Hee Chul Park, Sung Ki Cho, Do Hoon Lim, Seung Woon Paik
Cancer Res Treat. 2015;47(2):251-258.   Published online October 27, 2014
DOI: https://doi.org/10.4143/crt.2014.011
AbstractAbstract PDFPubReaderePub
Purpose
In this study, we retrospectively investigated the prevalence of arterioportal (AP) shunts in hepatocellular carcinoma (HCC) patients with portal vein tumor thrombosis (PVTT) and evaluated the changes in AP shunts after chemoembolization followed by external beam radiation therapy (EBRT).
Materials and Methods
We analyzed 54 HCC patients with PVTT who were treated with chemoembolization followed by EBRT. EBRT was uniformly delivered at a total dose of 30 to 45 Gy (median, 35 Gy), with a daily dose of 2 to 4.5 Gy. Angiographic images of chemoembolization before and after radiation therapy (RT) were reviewed to investigate the AP shunt.
Results
During the initial session of chemoembolization, 33 of 54 patients (61%) had an AP shunt. After EBRT, 32 out of 33 patients had an additional session of chemoembolization and were evaluated for a change in the AP shunt. The AP shunt decreased in 20 of 32 patients (63%) after chemoembolization followed by EBRT. The 1-year calculated overall survival (OS) rate for all patients was 52.6% and the 2-year OS was 36.4%. The median OS in all patients was 13 months. Patients with AP shunt showed poorer median OS than those without AP shunt, but there was no statistically significant difference (median, 12 months vs. 17 months).
Conclusion
The AP shunt frequently occurs in HCC patients with PVTT. This study suggests that a poor prognosis is associated with an AP shunt. Chemoembolization followed by RT may produce a decrease in AP shunts.

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    Wenzhe Fan, Bowen Zhu, Xinlin Zheng, Shufan Yue, Mingjian Lu, Huishuang Fan, Liangliang Qiao, Fuliang Li, Guosheng Yuan, Yanqin Wu, Xinhua Zou, Hongyu Wang, Miao Xue, Jiaping Li
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    Mohammed Bermo, Manuela C. Matesan, Malak Itani, Fatemeh Behnia, Hubert J. Vesselle
    Abdominal Radiology.2018; 43(11): 3001.     CrossRef
  • Chemoembolisation with polyvinyl alcohol for advanced hepatocellular carcinoma with portal vein tumour thrombosis and arterioportal shunts: efficacy and prognostic factors
    L. Xiao, Q. Liu, W. Zhao, H. Pang, Q. Zeng, Y. Chen, J. Zhao, Q. Mei, X. He
    Clinical Radiology.2018; 73(12): 1056.e17.     CrossRef
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    Qiu-song Liu, Que-lin Mei, Yan-hao Li
    European Journal of Radiology.2017; 89: 277.     CrossRef
  • Is a Technetium-99m Macroaggregated Albumin Scan Essential in the Workup for Selective Internal Radiation Therapy with Yttrium-90? An Analysis of 532 Patients
    Lidia Sancho, Macarena Rodriguez-Fraile, Jose Ignacio Bilbao, Carmen Beorlegui Arteta, Mercedes Iñarrairaegui, Veronica Moran, Bruno Sangro
    Journal of Vascular and Interventional Radiology.2017; 28(11): 1536.     CrossRef
  • Clinical impact of combined transarterial chemoembolization and radiotherapy for advanced hepatocellular carcinoma with portal vein tumor thrombosis: An external validation study
    Jeong Il Yu, Jae Won Park, Hee Chul Park, Sang Min Yoon, Do Hoon Lim, Joon Hyeok Lee, Han Chu Lee, Seon Woo Kim, Jong Hoon Kim
    Radiotherapy and Oncology.2016; 118(2): 408.     CrossRef
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Is There a Role of Postoperative Radiation Therapy in Completely Resected Stage I/II Thymic Epithelial Tumor?
Dongryul Oh, Yong Chan Ahn, Kwhanmien Kim, Jhingook Kim, Young Mog Shim, Jungho Han
Cancer Res Treat. 2012;44(3):166-172.   Published online September 30, 2012
DOI: https://doi.org/10.4143/crt.2012.44.3.166
AbstractAbstract PDFPubReaderePub
PURPOSE
Retrospective analyses of patients with stage I-II thymic epithelial tumors (TET) who were treated with either surgery alone (S) or surgery plus postoperative radiation therapy (SRT) were conducted to evaluate the role of adjuvant radiation therapy (RT).
MATERIALS AND METHODS
A total of 110 stage I-II TET patients following complete resection were included in this study. Postoperative radiation therapy was recommended for those with aggressive histologic type and/or invasive features according to the surgeons' judgment during the operation. A median dose of 54.0 Gy (range, 44 to 60 Gy) focused on the primary tumor bed was administered to 57 patients (51.8%).
RESULTS
In all patients, the rates of overall survival, disease-specific survival, and disease-free survival at 10 years were 91.7%, 97.1%, and 95.8%, respectively. No significant differences in disease-specific survival (100% in the S group and 93.5% in the SRT group at 10 years, p=0.12) and disease-free survival (98.1% in the S group and 94.5% in the SRT group at 10 years, p=0.41) were observed between the treatment groups, although a significantly larger number of World Health Organization (WHO)-type B2-C (p<0.001) and Masaoka stage II (p=0.03) tumors were observed in the SRT group than in the S group. No local recurrence was observed in the SRT group. No grade 2 or greater RT-related toxicities were observed in the SRT group.
CONCLUSION
Excellent outcomes were achieved in patients with stage I-II TET who underwent complete resection. Considering excellent local control and low morbidity, adjuvant RT may be considered in high risk patients with WHO-type B2-C histology and Masaoka stage II.

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    Ailin Cui, Yaoqiang Du, Chunjie Hou, Lin Zhang, Litao Sun, Hongfeng He
    Frontiers in Oncology.2023;[Epub]     CrossRef
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    Kyung Hwa Lee, Jae Myoung Noh, Yong Chan Ahn, Dongryul Oh, Jhingook Kim, Young Mog Shim, Jung-ho Han
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  • Potential Role of Adjuvant Radiation Therapy in Cervical Thymic Neoplasm Involving Thyroid Gland or Neck
    Jae Myoung Noh, Sang Yun Ha, Yong Chan Ahn, Dongryul Oh, Seung Won Seol, Young Lyun Oh, Joungho Han
    Cancer Research and Treatment.2014; 47(3): 436.     CrossRef
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