1　病历简介患者 ,男 ,5 0岁。胸闷、心慌 ,左背部持续性钝痛半年 ,加重3个月余就诊。体格检查 :胸廓对称 ,呼吸动度均匀一致 ,双肺叩诊呈清音 ,呼吸音清晰 ,心尖搏动不弥散 ,各瓣膜听诊区未闻及病理性杂音。超声检查 :在大动脉短轴切面上可见肺动脉左外上方有一约 10 4ｃｍ× 1 medical history of patients, male, 50 years old. Chest tightness, palpitation, persistent dull left back for half a year, aggravated more than 3 months of treatment. Physical examination: Symmetrical thorax, uniform respiratory movements, clear lung sounds, breath sounds, apex beats, and no pathological murmurs in the valve auscultation areas. Ultrasound examination: There is an approximately 10 4 cm × left and right outer side of the pulmonary artery visible in the short axis section of the aorta.