患者,男,18岁。因咳嗽、间断痰血,左侧胸痛,反复胸水,气喘三月余而入院。查体:心界不扩大,心律齐,第一心音亢进,心前区闻及Ⅲ级双期杂音。左肺呼吸音减弱,左胸四肋间以下叩诊实音。X线:左侧胸腔积液。心电图:窦性心动过速,偶发房性早搏,左房大。心脏彩超:左房明显增大,房内见两个高回声实质性肿块。一个附着于房间隔及心房底部,体积巨大,约 Patient, male, 18 years old. Due to coughing, intermittent bleeding, left chest pain, repeated pleural effusion, and asthma for more than three months before admission. Examination: The heart does not expand, the heart rate is equal, the first heart sounds are hyperactive, and the precordial area is heard of class III double noise. The breath sounds of the left lung are weakened, and the left chest is diagnosed with real sounds below the intercostal space. X-ray: left pleural effusion. Electrocardiogram: sinus tachycardia, occasional atrial premature beats, left atrial large. Cardiac echocardiography: The left atrium was significantly enlarged, and two high-echo solid masses were seen in the room. One is attached to the interatrial septum and the bottom of the atrium. The volume is huge, about