Multilocular thymic cyst associated with Sjogren's syndrome

A 61-year-old woman, who had been diagnosed as having Sjogren's syndrome, developed an anterior mediastinal mass. She was diagnosed with Sjogren's syndrome with thymoma, preoperatively. Extended thymectomy was performed. Macroscopically, the mediastinal mass showed thick-walled multiloculated cavities filled with turbid yellow fluid. Microscopically, the cyst lining was continuous with thymic lobules in the wall with inflammatory process, cholesterol granuloma formation, and prominent lymph follicular hyperplasia. She was diagnosed with multilocular thymic cysts associated with Sjogren's syndrome. (C) 2001 by The Society of Thoracic Surgeons.