[A surgical case of invasive thymoma with postaortic left innominate vein].

We report a surgical case of invasive thymoma with post-aortic left innominate vein (PALIV). The patient was a 59-year-old female, and admitted due to abnormal shadow on chest X-p. Preoperative chest CT demonstrated a invasive thymoma with the swelling of mediastinal lymph nodes. During the operation, we found no swelling of mediastinal lymph nodes, and the left innominate vein ran below the aortic arch and behind the ascending aorta. Thymothymomectomy combined resection of pericardium, lung and phrenic nerve was performed, with taking care of no injurying the PALIV. PALIV is a very rare anomary of vessels, and 32 cases have reported in the literature and only 15 cases in that of Japan.