[Supratentorial extra-axial arachnoid brain cysts].

Supratentorial extra-axial arachnoidal cysts are congenital benign formations of intracranial location filled with cerebrospinal fluid. The clinical symptomatology of arachnoidal cysts depended on the age of the patient and presence of complications. The pathogenetically justified surgical method of treatment of arachnoidal cysts in children is excision of cyst wall, emptying of its cavity, creation of shunt with the subarachnoidal spaces and basal cisternae in association with cystoperitoneostomy. In the adult patients additional cystoperitoneotomy is not performed.