Fig. 1From: Granulomatous diseases of the breast and axilla: radiological findings with pathological correlationGranuloma. a Diagram of a granulomatous response (with central necrosis) to a persisting antigen. Persisting antigens include microorganisms, foreign material or antigens that are unknown at this time. (Reproduced with permission) b Histologic photomicrographs (original magnification x20, hematoxylin-eosin) of a nonnecrotizing granuloma (left) composed of lymphocytes, macrophages, and giant cells and a necrotizing granuloma (right) with central necrosisBack to article page