INTRODUCTION Thymic epithelial tumors are rare but represent the most common primary tumors of the anterior mediastinum in adults.1 The overall incidence of thymoma is on the order of 0.13–0.17 cases per 100,000 person-years, reflecting its rarity.2, 3 Thymomas are typically indolent, slow-growing tumors that spread by local extension; metastases usually remain confined to intrathoracic sites, such as the pleura, pericardium, or lung parenchyma, and extrathoracic dissemination is uncommon.
