患者　女 ,51岁 ,咳嗽 3月余 ,加重伴痰中带血半月 ,每次咳血量约 1 0ml,鲜红色 ,时有小血块。既往健康 ,家族中无特殊病史。查体 :胸廓对称无畸型 ,左下肺叩诊浊实 ,呼吸音减弱 ,未闻及干湿音。实验室检查 :血常规、肝、肾功能未见异常。胸部平片 :左肺下叶后基底段可见 8cm Female patient, 51 years old, more than 3 months of cough, aggravating with bloody sputum half a month, each coughing blood about 10ml, bright red, when a small blood clots. Past health, no special family history. Physical examination: chest symmetry without deformity, the lower left lung percussion turbid real, weakened breath sounds, no smell and dry wet sound. Laboratory tests: blood, liver, kidney function without exception. Chest flat film: left lower lobe of the basal segment visible 8cm