原发性气管腺样囊性癌是指原发于环状软骨下缘至隆突间的气管恶性肿瘤 ,不包括支气管、肺癌浸润到隆突或气管者 [1] ,临床较少见 ,易被误漏诊。本文就两例误诊病例 ,分析原发性气管腺样囊性癌的误诊原因。1　病例资料【例 1】　女 ,4 2岁。 1990年 9月开始出现咽部异物感且渐加 Primary tracheal adenoid cystic carcinoma is the primary malignant trachea between the lower edge of the ring-shaped cartilage and the protuberance, not including the bronchi, lung cancer infiltration into the carina or trachea [1], the clinical less common, easily be mistaken Misdiagnosis. In this paper, two cases of misdiagnosis, analysis of misdiagnosis of primary tracheal adenoid cystic carcinoma. 1 case information [Example 1] Female, 4 2 years old. September 1990 began to appear pharyngeal foreign body sensation and gradually increased