Vasculitis of the gallbladder in a 70-year-old man with giant cell (temporal) arteritis.

A patient with giant cell (temporal) arteritis developed acute cholecystitis related to vasculitis. Histopathologically, the vasculitic lesions in the gallbladder resembled polyarteritis nodosa. In addition to demonstrating the rare occurrence of vasculitis of the gallbladder in a patient with giant cell arteritis, this case points out the inadequacies of currently used criteria to separate the various forms of arteritis.