Abstract
Thymic cyst with thymoma is a rare disease with only ten cases thus far reported in Japan. We report an additional case here.
A 28-year-old man was admitted to our hospital with an abnormal shadow on screening chest radiograph. Chest radiograph showed that a mass shadow whose contour was smooth, was present on the left side of the cardiac shadow. Chest CT revealed a cystic anterior mediastinal mass with a solid part on the wall. The tumor was resected by median sternotomy. It consisted of a multilocular cyst and a whitish mass on the wall.
Histopathologic examination revealed that a multilocular thymic cyst whose walls were lined by a monolayer of flat epithelial cells, with thymoma which consisted of spindle shaped tumor cells and lymphocytes.
