摘要
尽管二尖瓣环钙化(MAC)常易通过经胸壁超声心动图诊断,但作者曾见到1例酷似心内肿瘤的MAC罕见病例。该患者长期血液透析20年,因呼吸困难入住本院,经胸壁超声心动图显示在二尖瓣环前部有一严重钙化的包块,二尖瓣平均压力阶差为20mmHg。
Although mitral annular calcification (MAC) is usually easy to diagnose by transthoracic echocardiography, we experienced a rare case with MAC which looked like an intracardiac tumor. The patient who had been on chronic hemodialysis for 20 years was admitted to our hospital because of dyspnea. Transthoracic echocardiography showed a mass with severe calcification on the anterior mitral annulus and mean mitral gradient of 20 mm Hg. Because of the suspicion of the intracardiac calcified tumor that restricted mitral valve motion causing mitral obstruction, she underwent resection of the mass and mitral valve replacement. Pathological findings showed that the mass had a calcified envelope containing liquefied necrotic eosinophilic material with lympocytic infiltrate inside consistent with MAC. We should consider a possibility of MAC when we see a severe calcified mass attached to the mitral annulus in a patient on long-term hemodialysis.
