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Magnetic resonance imaging (MRI) showed that there was a 50x36 mm in diameter mass, and corpus callosum agenesis. Her seizures were controlled with carbamazepine (10mg/kg/day).
Stage (Gest.) age Development Dorsal induction 5-6 wks Closure of neural tube Ventral induction 7-12 wks Formation of brain segments and face Migration and 12-24 wks Migration of neurons from histiogenesis periventricular germinal matrix to cortex; cortical organisation Myelination 24 wks-3 Myelination yrs Stage Anomalies Dorsal induction Anencephaly, encephalocoele, Chiari malformation, spina bifida Ventral induction Holoprosencephaly, corpus callosum agenesis, vermian agenesis, facial abnormalities Migration and Gray matter heterotopias (e.g.
Prenatal and posnatal follow-up of a fatal interhemispheric arachnoid cyst with partial corpus callosum agenesis, asymmetric ventriculomegaly and localized polymicrogyria.