胸腺瘤是常见的纵隔肿瘤之一，一半以上的胸腺肿瘤缺乏特异性的临床表现，胸部平片能够提供的诊断信息相对较少，如果经验不足的话，很容易造成误诊、本文将就平片误诊为心脏增大的2例胸腺瘤分析如下：1病例例1：患者男性，57岁，胸骨后隐痛，心悸、气急四月，近二周来气急加重 Thymoma is one of the common mediastinal tumors. More than half of thymic tumors lack specific clinical manifestations. Chest radiographs provide relatively little diagnostic information. If there is insufficient experience, it is easy to cause misdiagnosis. This article will misdiagnose plain films. The analysis of 2 cases of thymoma with enlargement of the heart is as follows: 1 Case 1 Case: Patient male, 57 years old, with retrosternal pain, palpitations, shortness of breath, April, shortness of breath in the past 2 weeks