Radical mastectomy in a patient with coexistent Graves' disease.

A patient with the coincidental occurrence of thyrotoxicosis and medullary carcinoma of the breast is reported. Survivorship was considered optimal by performance of a mastectomy without the six to eight weeks' delay required to achieve euthyroidism by antithyroid drugs or radioiodine. The hyperthyroidism was controlled with propranolol, permitting an uneventful radical mastectomy.