患者女,22岁。近半年来经常在无明显原因地出现胸闷、咳嗽,3天前因活动后加剧而来我院就诊。右上肺野近后上纵隔处有一7×6×7cm大小的圆形阴影,边缘清楚。拟诊为上纵隔肿瘤而行开胸探查及肿瘤切除术。术中发现右上胸顶有一球形肿物,与 Female patient, 22 years old. In the past six months, chest tightness and coughing often occurred without obvious causes, and my hospital came to our hospital three days earlier because of the increased activity. There is a round shape of 7×6×7cm in the upper right lung and the superior posterior mediastinum. The edge is clear. The patient was diagnosed as an upper mediastinal tumor and he underwent thoracotomy exploration and tumor resection. During the operation, a spherical tumor was found on the top of the right upper chest, and