Radical Operation for Invasive Thymoma With Intracaval, Intracardiac, and Lung Invasion

We report a rare case of invasive type AB thymoma (WHO classification system) with intracaval and intracardiac extension into the right atrium. A cardiopulmonary bypass facilitated an en bloc excision of the tumor with a lobectomy, along with a combined resection of the right atrium and reconstruction of the bilateral brachiocephalic veins and right atrium. Aggressive surgical intervention should be considered in such cases, as long‐term prognosis is primarily dependent on a complete resection of the extended thymoma.