An unusual mass of tricuspid valve in an adult patient: blood-filled cyst.

Blood-filled cysts (BFC) within the heart are common findings at postmortem examinations of fetuses and infants. However, such cysts are very rare entities in adolescents and adults. We report here an adult case of BFC attached to the posterior leaflet of the tricuspid valve, demonstrating the importance of multimodal diagnostic imaging combining both echocardiography and magnetic resonance imaging.