[Intracranial arachnoid cyst: report of 23 cases].

: Twenty-three cases of intracranial arachnoid cyst are reported. Among them 8 cases developed primarily and 15 secondarily. There are 19 male and 4 female, ages ranged 3 to 40 years. The duration of illness were one month to 32 years. There are 19 cases located supratentoriumly and 4 subtentoriumly. Most of them were situated at Sylvius fissure (13 cases). 22 cases were treated by partial resection of the cyst and different kinds of shunt operations. Short-term follow-up study showed that the results were excellent without operative death. The etiology, pathogenesis, diagnosis of this disease and operative indications are discussed.