Congenital hydrocephalus due to prenatal intracranial hemorrhage.

A 3,400-g female neonate with a large head, widened sutures, and full fontanels at the time of her delivery by cesarean section is described. Imaging with ultrasound and computed tomography at 24 and 36 hours of age showed findings typical of hydrocephalus caused by intraventricular hemorrhage occurring several days or more prior to birth. There was no direct evidence of any predisposing vascular lesion or coagulopathy. Such a phenomenon has not been previously reported.