label: Arteriovenous malformation of the lip
label_lc: arteriovenous malformation of the lip
description: "A vascular malformation located in the lip that is characterized by direct blood shunting from an artery to a vein due to the absence of a capillary bed. The artery and vein can be directly connected by a fistula or indirectly connected by an abnormal vessel channel termed a nidus."