[A case of thymoma showing extensive necrosis]

A 44-year-old man was admitted with fever elevation and dyspnea. Chest X-ray and CT examination indicated a 6 x 4 cm anterior mediastinal tumor, pleural effusion and pericardial effusion. Blood examination showed no inflammation findings. Gallium scintigraphy indicated no uptake at the tumor. He underwent resection of the tumor. Postoperative pathohistological examination showed most part of the tumor fell into necrosis. And remained part of the tumor showed a figure of predominantly mixed type thymoma. Thymoma showing extensive necrosis is rare.