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자료유형
학술저널
저자정보
이정심 (인하대학교) 김태형 (연세대학교) 김연실 (가톨릭대학교) 김명수 (가톨릭대학교) 박재원 (영남대학교) 김성현 (연세대학교) 김현주 (가천대학교) 이창걸 (연세대학교)
저널정보
대한암학회 Cancer Research and Treatment Cancer Research and Treatment 제52권 제4호
발행연도
2020.1
수록면
1,031 - 1,040 (10page)

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Purpose The benefits of reirradiation for head and neck cancer (HNC) have not been determined. This study evaluated the efficacy of reirradiation using intensity-modulated radiotherapy (IMRT) for recurrent or second primary HNC (RSPHNC) and identified subgroups for whom reirradiation for RSPHNC is beneficial. Materials and Methods A total of 118 patients from seven Korean institutions with RSPHNC who underwent IMRT-based reirradiation between 2006 and 2015 were evaluated through retrospective review of medical records. We assessed overall survival (OS) and local control (LC) within the radiotherapy (RT) field following IMRT-based reirradiation. Additionally, the OS curve according to the recursive partitioning analysis (RPA) suggested by the Multi-Institution Reirradiation (MIRI) Collaborative was determined. Results At a median follow-up period of 18.5 months, OS at 2 years was 43.1%. In multivariate analysis, primary subsite, recurrent tumor size, interval between RT courses, and salvage surgery were associated with OS. With regard to the MIRI RPA model, the class I subgroup had a significantly higher OS than class II or III subgroups. LC at 2 years was 53.5%. Multivariate analyses revealed that both intervals between RT courses and salvage surgery were prognostic factors affecting LC. Grade 3 or more toxicity and grade 5 toxicity rates were 8.5% and 0.8%, respectively. Conclusion IMRT-based reirradiation was an effective therapeutic option for patients with RSPHNC, especially those with resectable tumors and a long interval between RT courses. Further, our patients’ population validated the MIRI RPA classification by showing the difference of OS according to MIRI RPA class.

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