[Unilateral non-tumor hydrocephalus in children. Atresia of the foramen of Monro?].

The authors report 5 cases of an uncommon unilateral hydrocephalus due to non neoplastic obstruction of the foramen of Monro. Clinically, it is an early hydrocephalus, and usual absence of neurological deficit contrasts with large unilateral ventricular dilatation. CT Scan made diagnosis easier, confirming non neoplastic etiology. The authors compare their own 5 cases with 14 cases alike in the literature and emphasize the usual post shunting good prognosis of these hydrocephalus. Etiology remains uncertain.