Abstract
Cardiac myxomas are the most common type of benign cardiac tumors and most of them occur in the left atrium but the biatrial myxoma is uncommon. We present a rare case of giant biatrial myxoma nearly obstructing the orifice of the inferior vena cava. A 58-year old woman presented with exertional dyspnea and intermittent chest discomfort. The non-pedunculated tumor involved most of the interatrial septum and extended from the orifice of the inferior vena cava to the displaced mitral annulus and the lower left pulmonary vein. The resected specimen weighed 76 gram and measured 80 × 40 × 30 mm. She did not complain of dyspnea or show any sign of recurrence by echocardiography during the 2-year follow-up period.
Highlights
Cardiac myxoma is the most common type of primary cardiac neoplasm and accounts for 30% to 50% of all primary tumors of the heart with an annual incidence of 0.5 per million populations [1,2]
Over 70% of all cardiac myxomas originate from the left and 18% from the right atrium
We present biatrial myxoma, which occupies both atria without pedunculating mass
Summary
Cardiac myxoma is the most common type of primary cardiac neoplasm and accounts for 30% to 50% of all primary tumors of the heart with an annual incidence of 0.5 per million populations [1,2]. Over 70% of all cardiac myxomas originate from the left and 18% from the right atrium. Biatrial myxomas account for less than 2.5% of all cardiac myxomas [3,4,5]. We present biatrial myxoma, which occupies both atria without pedunculating mass. Case presentation A 58-year old woman presented with exertional dyspnea and intermittent chest discomfort. She had no past medical or familial history, and physical and neurological examinations, chest radiography, and electrocardiography findings were normal, ESR was high at 54 mm/hr. Echocardiography revealed a huge, immobile mass without pedunculation occupying both atria (Figure 1A). Images showed a well-defined mass within the inferior portions of both atria with high signal intensity on T2 weighted images, slightly high signal intensity on T1 weighted images, no fat suppression on fat saturated images, and strong peripheral enhancement on gadolinium
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