局限性纤维性间皮瘤常发生于胸膜腔、腹膜腔 ,发生于肺较罕见 ,现报告 1例。患者　女 ,5 2岁 ,因胆囊息肉术前胸部体检。胸片发现 :左肺中野内带相当于左肺舌叶区肿块影 ,密度较均匀 ,边界清晰 ,肿块内缘与纵隔无清晰分界。胸片诊断左肺良性占位病变。CT平扫 :左肺舌叶软组织密 Limitations Fibrous mesothelioma often occurs in the pleural cavity, peritoneal cavity, occurs in the lungs are rare, is reported in 1 case. Female patient, 5 2 years old, because of gallbladder polyps preoperative chest examination. Chest X-ray findings: the left lung in the field with the equivalent of left lung lobes mass, density is more uniform, the boundary is clear, no clear boundary between the tumor and the mediastinum. Chest radiograph diagnosis of benign left lung lesions. CT scan: left lung soft tissue soft tongue