Suspected intraaqueductal perinatal hemorrhage in congenital hydrocephalus.

A 8-day-old boy with congenital hydrocephalus was given a shunt operation. Computed tomography (CT) revealed marked internal hydrocephalus and a high density area about the aqueduct of Sylvius, in the fourth ventricle and perhaps partly in the third ventricle which was completely absorbed one month later. Later conray ventriculography demonstrated aqueductal obstruction. Neuroradiologically there was neither neoplastic nor vascular lesion. The patient achieved almost normal motor and mental development at 9 months of age. The cephalopelvic discrepancy and vacuum extraction are thought to be the most likely caused of the hemorrhage. The site of hemorrhage was quite unusual as a neonatal intraventricular hemorrhage.