中央型小细胞(燕麦细胞)癌向周围蔓延。肿瘤切面质地软,呈片状，灰白色。图示肿瘤导致左主支气管阻塞，因此远端肺组织塌陷。燕麦细胞癌具有很强的侵袭性，原发瘤不是很大就已经发生了广泛转移。
Arising centrally in this lung and spreading extensively is a small cell anaplastic (oat cell) carcinoma. The cut surface of this tumor has a soft, lobulated, white to tan appearance. The tumor seen here has caused obstruction of the main bronchus to left lung so that the distal lung is collapsed. Oat cell carcinomas are very aggressive and often metastasize widely before the primary tumor mass in the lung reaches a large size.
