Abstract
Pemphigus is an autoimmune disease affecting the skin and mucosae. Oral lesions are common and sometimes are the only manifestations of the disease. The clinical presentations of pemphigus might mimic other vesiculobullous lesions of the oral cavity. We report a case of a 60-year-old male patient who complained of erosive lesions in the oral cavity. The lesions were diagnosed as pemphigus based on histopathological examination and immunofluorescence findings. The patient did not respond to topical steroids and low doses of systemic steroids. Since the patient began developing dermatological manifestations, he was administered pulse steroid therapy. He is currently under observation and his clinical signs and symptoms show improvement, although he has developed hyperglycemia as a complication.