Histopathologic findings obtained at postmortem.

(A) Choroidal vessel stained with Martius-scarlet-blue (MSB) shows necrotizing vasculitis with a mononuclear cellular infiltrate and fibrin deposition (red). (B) Hilar testicular vessel stained with MSB shows necrotizing arteritis, segmental/asymmetric accumulation of mononuclear cells in the vessel wall (large arrowhead). Note the focal nodose dilatation characteristic of polyarteritis nodosa (small arrowhead).