Arteriovenous fistulae (AVF) are the result of communication occurring between an artery andan adjacent vein. The etiology of an arterio-venous fistula can be either acquired or congenital in nature. They may occur anywhere in the body where arteries and veins are in proximity to each other. This case report involves an iatrogenic arteriovenous fistula discovered by sonographic examination in a female breast. Because of the potential for complications, which may occur with arteriovenous fistulae, it is important to investigate and supervene when patients are suspected of having these lesions.
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