Abstract
Four patients were treated for reccurrent ulcers in the pharynx for 16 months to four years. Three of them had higher than normal complement titers (CH50, C3, C4), indicating possible immunologic deficiency. Local treatment and various agents were used for the relief of pharyngeal pain and healing of the ulcerative lesions. Clinical studies are needed to clarify the pathogenesis of the disease and to develop rational and effective treatment.