Vascular malformations (aneurysms) in children occur in 60% of the head and neck and about 40% of the trunk and extremities, and those with extensive invasion can cause disfigurement and damage to organ function, with life-threatening complications such as hemorrhage, and wasting coagulopathy (KMS). In recent years, an average of 1,800 patients have been treated each year, of which 95% have received vascular sclerotherapy and 5% have been treated with the combination of arterial embolization and vascular sclerosis. Clinical classification In 1982, Mulliken classified two categories of hemangioma and vascular malformation according to their dual characteristics of malformation and tumor: hemangioma, a proliferation of vascular endothelial cells with biological characteristics of growth. Vascular malformations are characterized by abnormal dilatation and traffic of capillaries or arteries and veins, and were updated and refined by Waner and Suen in 1995 to classify vascular malformations as microvenous, venous malformations, and arteriovenous malformations. Capillary hemangioma is classified as microvenous malformation, cavernous hemangioma is classified as venous malformation, and trabecular hemangioma is classified as arteriovenous malformation. Second, treatment methods arteriovenous malformation arterial embolism + venous sclerosis combination venous malformation sclerotherapy hemangioma sclerotherapy lymphadenoma (malformation) sclerotherapy equipment support – X ray DSA US