[Angiosarcoma arising from an arterio-venous fistula in a renal transplant recipient. An unusual complication].

An angiosarcoma arising at the site of an arteriovenous fistula in a renal transplant recipient is reported. Only two similar cases have yet been described. This report is documented with an immunohistochemical study and etiopathogenesis is discussed. Immunosuppressive therapy and the arterio-venous fistula might both be involved in the occurrence of this neoplasm. We focus attention on this uncommon complication which should always be entertained when a renal transplant recipient complains about a painful arterio-venous fistula.