患者男,58岁。因反复胸闷半年、加重周入院。体检:左下肺呼吸音减弱,余无异常。CT检查:左侧下胸腔巨大肿块,大小约20cm×13.3cm×7.4cm,呈囊实性,内见脂肪密度影,未见钙化,病灶上缘清楚,下界累及膈面(图1);增强扫描肿块实性部分轻度强化,中央脂肪密度无强化(图2、3)。CT拟诊:左 Male patient, 58 years old. Due to repeated chest pain for six months, increasing weeks of admission. Physical examination: lower left lung breath sounds weakened, I no exception. CT examination: a huge left lower thoracic cavity, size of about 20cm × 13.3cm × 7.4cm, was cystic solid, see the fat density shadow, no calcification, clear edge of the lesion, the lower boundary involving the diaphragmatic surface (Figure 1); enhanced The solid mass of the lumps was mildly mild with no enhancement of central fat density (Figures 2, 3). CT diagnosis: left