患者女,34岁,胸闷、憋气、干咳2个月,在当地医院拍胸片诊断为纵隔肿瘤。转来本院拍胸片示左心缘外侧片状密度增高影,较均匀,但边缘模糊;侧位片示病变偏前,占据胸骨后心前间隙,后部与心影重叠, The patient female, 34 years old, had chest distress, belching, and dry cough for 2 months. He was diagnosed as a mediastinal tumor by taking a chest radiograph at a local hospital. The transfer of chest radiographs from this hospital showed that the density of the lateral lamina of the left heart margin increased and was more even, but the edges were blurred; the lateral images showed the lesion anterior, occupying the anterior heart gap of the sternum, and the posterior part overlapped with the heart shadow.