鼻咽癌是主要的未分化癌（89%），然而非鼻咽部上呼吸道癌主要是鳞状细胞癌（88%）。
Nasopharyngeal cancers were primarily undifferentiated carcinomas (89%), whereas nonnasopharyngeal upper respiratory tract carcinomas were predominantly squamous cell (88%).
目的：探讨食管原发性未分化小细胞癌临床病理特点。
Objective: To investigate the clinicopathologic features of undifferentiated small cell carcinoma of esophagus.
其是一种具有特殊组织学表现的低分化或未分化癌，浸润的淋巴细胞以T细胞为主。
It was a kind of poor differentiation or undifferentiated carcinoma with special histologic expression, the majority of infiltration lymphocytes comprised t cells.
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