Fig. 13 Wegener granulomatosis. Mild proptosis combined with conjunctival chemosis and hyperemia adjacent to congested tortuous blood vessels of a Wegener granulomatosis patient. The right optic nerve disc shows optic nerve pallor (inset) (A). The excisional biopsy from the conjunctival lesion reveals granulomatous vasculitis with focal necrosis (arrow) (B).