Renal cell carcinoma and vasculitis: report of two cases.

A 63-year-old caucasian male with systemic leukocytoclastic vasculitis involving the skin, lungs, and gastrointestinal tract was found to have a renal cell carcinoma at autopsy. A 77-year-old-woman with a history of hypertension was felt to have temporal arteritis that was confirmed by biopsy. The autopsy revealed a renal cell carcinoma in association with widespread giant cell arteritis. The possible association of renal cell carcinoma with vasculitis and an assessment of the possible clinical usefulness are presented and cases of vasculitis with renal neoplasms are briefly reviewed.