The occurrence of distant metastases was significantly related to locoregional control, TNM stage, N (nodal) classification, and the primary sites being the hypopharynx and nasopharynx.

• 容易发生远隔转移的因子包括局部控制失败、原发肿瘤的期别高、颈部淋巴转移较严重、及原发肿瘤位在鼻咽部与下咽部者。