目的对照分析肺内经病理 证实的26例原发性肺黏液表皮样癌 (Mucoepidermoid Carcinoma，MEC)与34 例中央型肺癌的CT表现。方法 回顾性分 析行CT检查并经手术病理证实的26例肺 MEC患者资料，并由2名具有10年以上工作 经验的高级职称医师分析其影像资料。将 不易鉴别的22例中央型肺MEC挑选出来， 并与中央型肺癌进行征象对比分析。结 果 病变主要为中央型22例，外周型4例。 中央型肺MEC与中央型肺癌相比，年龄、 性别比、病灶最大径、形态、边界、分叶 率、液化坏死率、强化均匀程度及远端支 气管扩张情况均有统计学差异(P<0.05)。 结论 肺MEC的临床及CT表现具有一定特 征，详细地分析CT征象，有助于其与中央 型肺癌鉴别。

Objective To identify CT features of primary pulmonary mucoepidermoid carcinomas (MECs) and central type lung cancers. Methods Totally 26 patients with MECs were examined by CT, and their images were retrospectively reviewed by two experienced radiologists. The CT features of 22 central type of MECs were compared with those of 34 central type of lung cancers. Results The tumors predominant presented as central type (n=22), followed by peripheral type (n=4). There were significant differences of age, gender, the maximum diameter, shape, margin, the presence of lobulated shape, liquefactive necrosis, heterogeneous enhancement, and distal bronchial dilatation between central type of MECs and lung cancers. Conclusion CT should be helpful for the characterization and differential diagnosis of MECs.