Methods:18 cases of SMTs of head and neck following radiotherapy were studied retrospectively.

方法：回顾性分析了我科18例头颈部肿瘤放射治疗后诱发第二恶性肿瘤的临床资料。

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Objective:To investigate the clinical diagnosis, mechanism and treatment for second malignant tumors (SMTs) of head and neck induced by radiotherapy.

目的：探讨头颈部肿瘤放射治疗后诱发第二恶性肿瘤的诊断、机理及治疗方法。

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