Abstract
PERIVENTRICULAR-intraventricular hemorrhage is by far the most important variety of neonatal intracranial hemorrhage because it is both a common and a serious lesion. The other major types of hemorrhage — subdural hemorrhage, primary subarachnoid hemorrhage, and intracerebellar hemorrhage — are either rare or benign.1 The enormous importance of periventricular-intraventricular hemorrhage is linked in many ways to the advent of modern neonatal intensive care and the consequential marked increase in survival rates for small premature infants. Because periventricular-intraventricular hemorrhage is common in such infants, the lesion is the most important neurologic disorder in most neonatal-intensive-care facilities.In the following discussion I . . .