[Indications for shunting in children with tumours of posterior fossa].

Between 1980-1987 in the Neurosurgery Department we treated 113 patients with cerebellar astrocytoma, 52 children with medulloblastoma and 30 patients with ependymoma. Before operation shunting was used in 10 patients and after operation in 15 patients, generally shunting was necessary in 22% patients with cerebellar astrocytoma. In cases of medulloblastoma before operation shunting was used in 6 children and after in 15 patients, generally shunting was necessary in 21 (40%) patients. In cases of ependymomas shunting was used in 6 patients before operation and 5 cases after operation, generally shunting was necessary in 11 (36%) patients.