Congenital huge arterio-venous malformation

Arterio-venous malformation represent congenital anomaly of vessels at which inside a brain tissue texture of pathological arteries and veins are formed. Under the world data frequency of occurrence АВМ makes from 0.89 till 1.24 on 100 000 population in a year. The lethality is 10–15%, death reason is usually the development of hemorrhage. Rupture of arteriovenous malformation usually occurs at the age of 20–40 years and often is the first display of disease. In rare instances arterio-venous malformation happens so big that causes an ischemia of the next sites of a brain and clinically proceeds like a brain tumour. More often such malformations meet in pool of an average brain artery and extend from a bark of a brain to ventricules, often accompanied by a hydrocephaly. The clinical case of a favorable outcome of repeated subarachnoid hemorrhages at the patient with congenital huge arteriovenous malformation under conservative therapy is described.