问题 单项选择题 B1型题

头颈部肿瘤中仅次于皮肤癌的最常见口腔肿瘤是()

A.舌癌

B.口底癌

C.齿龈癌

D.唇癌

E.颊黏膜癌

答案

参考答案:D

解析:

口腔癌总的淋巴结转移率约36%,并且与病变范围和病期有关,局部早期(T~T)一般低于20%,局部晚期(T~T)则高达50%。病变越远离中线其淋巴结转移率越低。由颈淋巴结转移率自高到低为舌、口底、下牙龈、颊黏膜、上牙龈、硬腭及唇。

常见口腔癌发病率由高到低依次为唇癌、舌癌、口底癌、齿龈癌及颊黏膜癌。

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