A Case of Anaphylactoid Purpura in Old Man Associated with Renal Cell Carcinoma

Abstract

A 71-year-old man with anaphylactoid purpura was reported. The lesions occurred on the lower legs and forearms, and they showed palpable purpura. The biopsy specimen obtained from the right lower leg showed necrotizing angitis of the blood vessels in the almost whole dermis. In immunofluorescence, slight deposit of IgA was detected in the blood vessel wall in the lower dermis. Thereafter nephrotic syndrome and renal cell carcinoma were found as complications. Thus anaphylactoid purpura in the aged may be referred to as one of the dermadromes for internal malignancy.