There were 57 cases (66.28%) of squamous cell carcinoma, 17 cases (19.27%) of undifferentiated carcinoma, and 12 (13.95%) of ade ocarcinoma. Most of these cases were of late stages.

• 所有病例均经病理细胞学确诊；鳞癌57例(66.；28%25)；未分化癌17例(19