Recurrence of thymoma in the right atrium arising from the coronary sinus.

Invasive thymoma is a malignant tumor of the anterior mediastinum that could have intravenous affinity associated with a high recurrence rate. This report highlights the need of coronary sinus exploration when intraatrial thymoma recurrence is diagnosed. Surgical resection of invaded coronary sinus can be achieved safely with a good result.