1病历资料患者女,16岁,初中学生。因“反复咳嗽、咯血5个月,加重3 h”于2009-08-14急诊入院。患者于2009年3月无明显诱因出现咳嗽、痰中带血,无胸闷、气喘,无双下肢水肿,无胸痛,无盗汗,无消廋,无发热。既往体健,无输血史,无粉尘、毒物、放射性物质接触史。无烟酒嗜好,家族史无? Patient information Female patient, 16 years old, junior high school student. Due to “repeated cough, hemoptysis 5 months, increased 3 h” in 2009-08-14 emergency admission. Patients in March 2009 no obvious incentive cough, bloody sputum, no chest tightness, asthma, unrivaled lower extremity edema, no chest pain, no night sweats, no elimination, no fever. Past physical health, no history of blood transfusion, no dust, poison, radioactive exposure history. Smoke-free wine hobby, family history without?