A case of granulomatous vasculitis affecting vessels in the left temporal area of the skull, and also vessels in the right and left axillary areas, is described. Initially, the patient responded favourably to antibiotic therapy, raising the possibility of a microbiologic agent as the causative factor of this puzzling disorder. Finally she has responded very favourably to steroids, thereby indicating a possible immunologic basis for the condition, as has already been postulated by several authors.