例1，男，43岁。因患食管资门癌行食管下端及上半胃切除术。半个月后病人出现左侧胸痛，向左肩放射，并有黑便。钡餐造影未发现吻合口涌。术后一个月，病人出现吞咽困难和严重胸骨后疼痛，摄胸片见左心尖部有小液平面，其上心影与肺门间有月牙形透光带，诊断为心包积液积气。心 Example 1, male, 43 years old. The lower esophagus and upper gastrectomy were performed due to esophageal cancer. Two weeks later, the patient developed left chest pain, radiated to the left shoulder, and had black stools. There was no anastomotic leakage in barium meal imaging. One month after the operation, the patient developed dysphagia and severe poststernal pain. The chest radiograph showed a small fluid plane at the left apex, and there was a crescent-shaped transparent zone between the heart shadow and the hilum. The diagnosis was a pericardial effusion. heart