Ectopic hepatic tissue presenting as right atrial mass.

A 52-year-old woman had a well-circumscribed, mobile mass (1.8 × 1.7 cm) in the right atrium detected by echocardiography and confirmed by magnetic resonance imaging. Subsequent histologic evaluation of the mass revealed benign, ectopic hepatic tissue. Ectopic liver is a rare occurrence, and most frequent anatomical distribution of ectopic hepatic tissue is the region around the gallbladder. In exceptional cases, ectopic liver can be found within the thorax. The reported case demonstrates that ectopic liver should be included in the differential diagnosis of right atrial masses removed surgically.