The CT detection of thymic hyperplasia in association with thyrotoxicosis: case report.

A thymic mass was diagnosed by computed tomography in a young male with an anterior mediastinal mass demonstrated by chest X-ray. The association of thymic hyperplasia and thyrotoxicosis is discussed and the importance of CT in the evaluation of anterior mediastinal masses in patients with thyrotoxicosis is emphasized. Micronodular enlargement of the thymus is a common association of Graves' disease in contradistinction to the rare detection of radiologically visible thymic masses in this condition.