Bullous pemphigoid masquerading as acute radiation dermatitis: case report.

We report the first case of bullous pemphigoid complicating radiation therapy for vulvar cancer. Shortly after completion of postoperative radiation therapy for a TIN1 vulvar carcinoma, the patient presented with a rash that started within, but continued to extend, well beyond the radiation field. A biopsy of the lesions confirmed the diagnosis of bullous pemphigoid, and she had prompt clinical resolution with systemic tetracycline and steroids.