title: An approach to mediastinal masses associated with hyperthyroidism.
abstract: Benign thymic hyperplasia (BTH) is a known feature of hyperthyroidism, but is infrequently appreciated by clinicians. In most cases thymic enlargement is minimal; however, it may occasionally present as an appreciable anterior mediastinal mass. While surgical resection is a common approach to such a mass, recognition of the benign nature of BTH and its regression following treatment of hyperthyroidism would prevent a major surgical procedure. We present three cases of BTH associated with hyperthyroidism and describe our approach to this syndrome.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D006980:Hyperthyroidism / Q000150:complications / Q000628:therapy*; D008875:Middle Aged; D013952:Thymus Hyperplasia / Q000150:complications / Q000628:therapy*