Arteriovenous malformation in the buttock: treatment with a combination of selective embolization and excision.

Arteriovenous malformation (AVM) in a 22-year-old Japanese female is reported. The malformation presented as a nontender, pulsating tumor. An area of marked hypervascularity was revealed in the dermis and muscles of the right buttock by arteriography. The tumor was removed after embolizing the right superior and inferior gluteal arteries, which were the main feeding arteries. Histological examination revealed a number of artery-like vessels, encircled by proliferating capillaries. Follow-up three years after excision showed no clinically remarkable changes. Selective embolization was useful for the excision.