Derivación de LCR y tumores de fosa posterior en la infancia

Abstract

Summary Sixty-six children with posterior fossa tumours and hydrocephalus are reviewed in order to ascertain whether a CSF-shunt was necessary. The anatomical situation and pathology of tumours were related to the need for a shunt due to I1CP or other complications. 34,8 % of patients were shunted to control hydrocephalus. 35 % of midline tumours (most of them malignant) needed a per-operative valve while of those situated in the cerebellar hemispheres (usually benings) only 22 % need to be shunted. On the whole, a shunt was insert in 42 % of malignant tumours and in 17 % of benign neoplasm (astrocytomas 20,8 oTo; medu­ lloblastomas 45,4 %, ependymomas 57,1 %). The need for a postoperative shunt due to I1CP (in patients with craniec­ tomy without a previous shunt) was scanty: 4,3 % of astrocytomas, 23,5 % of medulloblastomas and 25 % of ependy­ momas. It is concluded that a CSF shunt is not necessary in all cases of posterior fossa tumours, and it depends on tumour situation and pathology. KEY WuRDS: Childhood posterior fossa tumours; hydrocephalus; CSF shunt.