鼻咽癌是我省常见的肿瘤之一,淋巴结是其主要的转移部位。治疗中颈部淋巴引流区域均已给根治性或予防性放射。但颏下区域却不包括在照射野内。我们在实践工作中发现有颏下淋巴结转移现象,为探讨其原因,将我院发生的病例加以分析如下。 Nasopharyngeal carcinoma is one of the common tumors in our province, and lymph nodes are the main metastatic sites. The treatment of cervical lymphatic drainage area have given radical or preventive radiation. However, the submental area is not included in the exposure field. We found in the practice of submental lymph node metastasis, in order to explore the reasons for the occurrence of our hospital to be analyzed as follows.