1998年1月～1999年8月我院收治以胸腔积液为主要表现的纵隔畸胎瘤2例,现报告如下。1　病例报告　　　例1,患者,女,27岁,15d前无诱因地突然出现左侧胸痛,呼吸时加剧,伴胸闷咳嗽,体温不高,当地医院摄X线胸片发现左侧胸腔积液,诊断为结核性胸腹炎,予抗痨及胸腔抽水治疗,1个月后胸 From January 1998 to August 1999, 2 cases of mediastinal teratoma with pleural effusion as the main performance were treated as follows. 1 case report case 1, patient, female, 27 years old, 15d before the sudden emergence of left chest pain, increased breathing, chest tightness and cough, body temperature is not high, the local hospital photo X-ray findings of left pleural effusion, Diagnosis of tuberculous pleural peri-abdominal inflammation, anti-tuberculosis and chest pumping treatment, 1 month after the chest