A case of arteriovenous hemangioma extending from the lower lip to the right buccal region

Arteriovenous hemangioma is apparently caused by some abnormality occurring in the course of development of arteries and veins. It is manifested as an arteriovenous fistula or an arteriovenous aneurysm. Acquired arteriovenous hemangioma is caused by trauma or incomplete excision of a hemangioma. In the oral region, arteriovenous hemangioma usually arises in the jaw bone, and reports of cases arising in soft tissue are rare.Recently, we treated an arteriovenous hemangioma that had developed in the lower lip and extended to the right buccal region of a 30-year-old woman. Purpura of the mental region had been present since birth. The lesion was excised when the patient was 5 years old, and she subsequently had received surgical therapy four times. Accordingly, angiography showed no characteristic findings of arteriovenous hemangioma, and the lesion was surgically removed. Histologically, the walls of the arteries and veins consisted of well-developed layers of muscle, and the vascular lumen was dilated. Based on these findings, arteriovenous hemangioma was diagnosed.