Bullous pemphigoid and Hashimoto's thyroiditis.

Both bullous pemphigoid (BP) and Hashimoto's thyroiditis (HT) are suspected of being autoimmune disorders. Each disorder has been reported with other diseases associated with autoimmune phenomena. Thyroid disorders have been reported with BP, but never well documented HT with thyroid antibodies. We report a patient with hypothyroidism due to HT who subsequently developed BP. The importance of this association is discussed, particularly as it relates to autoimmunity.