肺上沟癌较少见，易误诊，本文报告３例。２例院外误诊为肺结核，胸膜增厚，曾抗痨治疗一月余．一例院外诊断不明。１一般资料本组３例均为男性，年龄６０～６５岁。肿瘤均发生在右侧肺尖部。主要临床症状为患侧肩臂部疼痛（３例），上肢发麻，不能上举（１例），Ｈｏｒｎｅｒ Pulmonary epithelial cancer is rare and often misdiagnosed. This article reports 3 cases. Two cases outside the hospital misdiagnosed as tuberculosis, pleural thickening, had anti-tuberculosis treatment for more than a month. An out-of-hospital diagnosis is unknown. 1 General Information This group of 3 cases were all males, aged 60 to 65 years old. The tumors occurred at the right lung apex. The main clinical symptoms were ipsilateral shoulder and arm pain (3 cases), numbness of the upper limbs, no lifting (1 case), Horner