肺胚胎性癌肉瘤是一种罕见的肺部混合型恶性肿瘤,现报告一例如下:患者男,35岁,三个月来咳嗽、吐痰。有时痰中带血丝。近20d来症状加重,伴右胸疼痛,仰卧或右侧卧时感胸闷,呼吸困难,左侧卧时缓解,乏力,食欲下降。体检:无阳性发现。X线检查:右下肺后基底段可见10cm×10cm圆 Pulmonary embryonal carcinosarcoma is a rare type of mixed lung malignancy. One case is reported as follows: The patient is male, 35 years old, with coughing and spitting for three months. Sometimes there is blood in the sputum. Symptoms worsened in the past 20 days, with right chest pain, chest tightness when lying supine or on the right side, difficulty in breathing, remission when lying on the left side, fatigue, loss of appetite. Physical examination: No positive findings. X-ray examination: 10cm × 10cm circle visible in the posterior segment of the right lower lung