Publication date: August 2017
Source:Oral Oncology, Volume 71
Author(s): Yosuke Kitani, Akira Kubota, Madoka Furukawa, Yukiko Hori, Yuko Nakayama, Tetsuo Nonaka, Nobutaka Mizoguchi, Yuka Kitani, Hiromitsu Hatakeyama, Nobuhiko Oridate
BackgroundIn patients with head and neck cancer, the management of second primary cancer (SPC) is particularly important for improving survival because of its high incidence and associated mortality. We evaluated the impact of combination chemotherapy on survival and SPC.MethodWe retrospectively analyzed data from 49 patients treated with definitive radiation therapy (RT) for T2N0M0 laryngeal squamous cell carcinoma between 2003 and 2011. Among them, 22 patients received combined modality treatment with radiotherapy and S-1 (RT+CT group).ResultsThe median follow-up period was 71months (32–111months). A significant difference in overall survival (OS, P<0.01) was observed between the RT+CT group (n=22) and the RT alone group (n=27) though no significant differences were observed in local control and disease specific survival. Univariate analyses showed that an older age (P<0.05) and a higher grade (P<0.05) were associated with OS. Multivariate analysis identified chemotherapy as the most significant predictor of survival (OR, 0.056; 95% CI, 0.008–0.353, P<0.01). A significantly lower incidence of distant metastasis (DM)+SPC (5-year incidence: 5% vs. 19%, P<0.05) and fewer deaths from these causes (1 vs. 8: P<0.05) were observed in the RT+CT group. Multivariate analysis showed that chemotherapy was the most significant factor for the incidence of DM+SPC (OR, 0.074; 95% CI, 0.0065–0.84; P<0.05).ConclusionThe findings of this study suggest the possibility that combined modality treatment with radiotherapy and S-1 improve survival by preventing distant metastasis and second primary cancer.
http://ift.tt/2r2xPHi
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