PMID- 34749016 OWN - NLM STAT- MEDLINE DCOM- 20221115 LR - 20221222 IS - 2320-2890 (Electronic) IS - 2319-4170 (Print) IS - 2319-4170 (Linking) VI - 45 IP - 5 DP - 2022 Oct TI - Stereotactic body radiotherapy plus cetuximab for previously irradiated un-resectable head and neck cancer. PG - 838-846 LID - S2319-4170(21)00148-7 [pii] LID - 10.1016/j.bj.2021.10.013 [doi] AB - BACKGROUND: The aim of the study was to explore the treatment outcomes and prognostic factors for patients with previously irradiated but unresectable recurrent head and neck squamous cell carcinoma (rHNSCC) treated by stereotactic body radiotherapy (SBRT) plus cetuximab at a single institute in Taiwan. METHODS: From February 2016 to March 2019, 74 patients with previously irradiated but unresectable rHNSCC were treated with SBRT plus cetuximab. All patients received irradiation to the gross tumor and/or nodal area with 40-50 Gy in five fractions, with each fraction interval >/=2 days over a 2-week period by using the CyberKnife M6 machine. An(18)F-fluorodeoxyglucose positron emission tomography-computed tomography (PET-CT) scan was performed before treatment for treatment target delineation (n = 74) and 2 months later for response evaluation (n = 60). The median follow-up time was 9 months (range 1-36 months). RESULTS: The treatment response rate was complete response: 25.0%, partial response: 41.7%, stable disease: 11.7%, and progressive disease: 21.7% based on the criteria of the Response Evaluation Criteria in Solid Tumors (n = 72) and complete metabolic response: 21.7%, partial metabolic response: 51.7%, stable metabolic disease: 13.3%, and progressive metabolic disease: 13.3% based on PET-CT (n = 60), respectively. The 1-/2-year overall survival (OS) and progression-free survival (PFS) rates were 42.8%/22.0% and 40.5%/19.0%, respectively. In the logistic regression model, a re-irradiation interval >12 months was observed to be the only significant prognostic factor for a favorable treatment response. In the Cox proportional hazards model, a re-irradiation interval >12 months and gross tumor volume (GTV) <== 50 ml were favorable prognostic factors of OS and PFS. CONCLUSION: SBRT plus cetuximab provides a promising salvage strategy for those patients with previously irradiated but unresectable rHNSCC, especially those with a re-irradiation interval >12 months or GTV <== 50 ml. CI - Copyright (c) 2021 Chang Gung University. Published by Elsevier B.V. All rights reserved. FAU - Huang, Tai-Lin AU - Huang TL AD - Department of Hematology-Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan. FAU - Chuang, Hui-Ching AU - Chuang HC AD - Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan. FAU - Tsai, Ming-Hsien AU - Tsai MH AD - Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan. FAU - Chien, Chih-Yen AU - Chien CY AD - Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan. FAU - Su, Yan-Ye AU - Su YY AD - Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan. FAU - Lin, Yu-Tsai AU - Lin YT AD - Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan. FAU - Yang, Chao-Hui AU - Yang CH AD - Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan. FAU - Lai, Chi-Chih AU - Lai CC AD - Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan. FAU - Li, Shau-Hsuan AU - Li SH AD - Department of Hematology-Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan. FAU - Fang, Fu-Min AU - Fang FM AD - Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan. Electronic address: fang2569@cgmh.org.tw. LA - eng PT - Journal Article DEP - 20211105 PL - United States TA - Biomed J JT - Biomedical journal JID - 101599820 RN - PQX0D8J21J (Cetuximab) SB - IM MH - Humans MH - Cetuximab/therapeutic use MH - *Radiosurgery/adverse effects/methods MH - Positron Emission Tomography Computed Tomography MH - Neoplasm Recurrence, Local/surgery MH - *Head and Neck Neoplasms/drug therapy/radiotherapy/etiology MH - Squamous Cell Carcinoma of Head and Neck/radiotherapy MH - *Carcinoma MH - *Metabolic Diseases PMC - PMC9661507 OTO - NOTNLM OT - Cetuximab OT - Gross tumor volume OT - Head and neck squamous cell carcinoma OT - PET-CT OT - Re-irradiation OT - Stereotactic body radiotherapy EDAT- 2021/11/09 06:00 MHDA- 2022/11/16 06:00 PMCR- 2021/11/05 CRDT- 2021/11/08 20:16 PHST- 2021/02/17 00:00 [received] PHST- 2021/10/28 00:00 [revised] PHST- 2021/10/31 00:00 [accepted] PHST- 2021/11/09 06:00 [pubmed] PHST- 2022/11/16 06:00 [medline] PHST- 2021/11/08 20:16 [entrez] PHST- 2021/11/05 00:00 [pmc-release] AID - S2319-4170(21)00148-7 [pii] AID - 10.1016/j.bj.2021.10.013 [doi] PST - ppublish SO - Biomed J. 2022 Oct;45(5):838-846. doi: 10.1016/j.bj.2021.10.013. Epub 2021 Nov 5.