Thymic Cavernous Hemangioma With a Left Innominate Vein Aneurysm

Here we report a case of thymic cavernous haemangioma with the left innominate vein aneurysm. A 43-year-old man presented with chest pain. Enhanced chest computed tomography revealed an anterior mediastinal tumor measuring 60 × 52 × 38 mm with multiple venous lakes and focal specks of calcification, composed of a low-density soft tissue mass along with a left innominate vein aneurysm. We preoperatively diagnosed the mass as a thymic hemangioma and subsequently performed surgical resection. Pathologic diagnosis was a thymic cavernous hemangioma with a left innominate vein aneurysm, which is very rare.