AVM, or Arteriovenous Malformation, is a condition characterized by a tangle of abnormal blood vessels in the brain or spine that can rupture and cause serious damage. Some synonyms for AVM include arteriovenous fistula, abnormal vascular formation, vascular malformation, and cerebral angioma. A related condition is Arteriovenous Hemangioma, which refers to a cluster of blood vessels with abnormal connections. These terms may be used interchangeably to refer to the presence of abnormal blood vessels in the body's tissues. Treatment for AVM may include surgery, radiation therapy, and medication, but it can depend on the severity and location of the malformation.