Abstract
A 42-year-old female who had been on hemodialysis since 1987 was found to have a small prominence at the aortic knob on a routine chest X-ray film in June 1993. It had enlarged to a 7-cm mass in August 1993. Although a dissecting aneurysm was suspected from the clinical course, a chest CT scan and MRI examination revealed an anterior mediastinal tumor. Resection of the mediastinal tumor was performed on August 25. The pathological diagnosis was thymic cyst, and no evidence of malignancy was detected.
This is the first report of thymic cyst occurring in a patient on chronic hemodialysis, and the clinical course with rapid enlargement of the thymic cyst was of interest.
