Adenomatoid tumors are relatively uncommon benign tumors of mesothelial origin, usually occurring in the male or female genital tracts. Extragenital adenomatoid tumors are quite rare. Here, we report a very rare case of adenomatoid tumor of the mediastinum. A 67-year-old woman was admitted to our hospital with an abnormal shadow that appeared on a routine chest radiograph. After further radiological evaluation suggested a diagnosis of thymoma, surgical resection was performed, and histologic and immunohistochemical examination yielded a definitive diagnosis of adenomatoid tumor. The patient remained clinically free of disease at follow-up, 19 months later.
Keywords: Adenomatoid tumor; Mediastinal tumor.