[Two cases of thymic hyperplasia with Basedow's disease]

Two cases of thymic hyperplasia with Basedow's disease were reported. One case was a 23-year-old female. The CT examination disclosed a mediastinal mass, which was reduced in size after an anti-thyroid drug and subtotal thyroidectomy normalized the thyroid function. The other case was a 29-year-old male with thyrotoxic myopathy. The CT examination disclosed a mediastinal mass, which suggested thymoma. A total thymectomy was performed and the mass was pathologically diagnosed as thymic hyperplasia.