Giant Left Atrial Myxoma with Mitral Valve Obstruction

Cardiac myxomas are the most common primary intracardiac tumors in adults. Although benign from a histopathological point of view, they can be life-threatening for the patient. We present a case of an unusually giant left atrial myxoma causing mitral valve obstruction and pulmonary hypertension successfully treated with surgical resection. Our patient was a 54-year-old woman who presented to our emergency complaining of progressive dyspnea of about 1 month duration. On cardiovascular examination, we found crackling rales at both lung bases and a diastolic murmur in the mitral focus. Transthoracic echocardiography revealed a giant mass in the left atrium connected to the interatrial septum and extended into the left ventricle during diastole which caused obstruction of the left ventricular inflow tract and a pulmonary hypertension. The patient underwent a median sternotomy with the removal of left atrial mass and patch closure of the interatrial septum. Histopathological examination confirmed the diagnosis of myxoma. One week later, the patient was discharged without any complications. Giant left atrial myxoma although a benign mass, can induce dramatic symptoms and be life-threatening. In case of suspicion, it must be diagnosed early by transthoracic echocardiography and urgently managed by surgical removal.