Described as two or even more vascular malformations found in one lesion. Abnormalities during the origin/training course/quantity of significant blood vessels which have anatomical names Syndromes wherein vascular malformations are challenging by symptoms in addition to vascular anomalies The chance of perioperative morbidity and mortality increases with escalating Spetzler-Martin gr... https://www.sgvascularctr.com/service/vascular-malformations/