Granulomatous vasculitis are defined as a pathological process due to the destruction of vessels by a granulomatous infiltrate. The inflammatory infiltrate is made of several cellular lines in variable proportions. These diseases are classified according to the affected organs and to the nature of the vessels. Some granulomatous vasculitis remain cryptogenetic in nature, others have an infectious origin, and still others follow a necrotizing leucocytoclastic vasculitis with immune complexes.
