Choroid plexus hemorrhage in premature neonates: recognition by sonography.

In 34 consecutive infants admitted to the neonatal intensive care unit with birth weight of less than 1,500 g, 80 cranial real-time sonograms were obtained to determine the incidence of choroid plexus hemorrhage. Choroid plexus hemorrhage was diagnosed only in the absence of germinal matrix hemorrhage. Diagnostic criteria included choroid plexus nodularity, enlargement (greater than 12 mm in anteroposterior diameter), or asymmetry between right and left (greater than 5 mm). Ipsilateral intraventricular clots or occipital horn dilatation supported the diagnosis of choroid plexus hemorrhage in most cases. Choroid plexus hemorrhage appeared to be the sole bleeding site in 10 (59%) of the 17 patients with intracranial hemorrhage. Hemorrhage in the region of the caudate nucleus was seen in the other seven cases (41%). Ventricular dilatation and/or intraventricular hemorrhage accompanied nine (90%) of the 10 cases of choroid plexus hemorrhage. This study suggests that in very low-birth-weight premature neonates, the choroid plexus may be a more frequent site of intracranial hemorrhage than previously believed.