头颈部癌的特点是肿瘤常在较长期间内局限于原发部位及其有关引流区的淋巴结内,发展缓慢,只晚期才发生转移,局部手术或放疗对早期病例有较好的疗效,但长期随访发现,死于远处转移的病例并无局部复发。近些年来,人们越发重视微转移灶,在局部治疗前后 Head and neck cancer is characterized by the fact that the tumor is often confined to the primary site and lymph nodes in the drainage area for a relatively long period of time. It develops slowly, metastasis occurs only in the late stage, and local surgery or radiotherapy has a good effect on early cases. However, long-term follow-up found no local recurrence in patients who died of distant metastases. In recent years, people pay more attention to micrometastases before and after topical treatment.