Volume 66 No 3  Cover Story

The natural history of posthemorrhagic ventricular dilation in premature infant (gestational age 29+1 weeks). Serial coronal scan cranial ultrasound (cUS) images. cUS taken 2 days (upper left) shows right grade III and left grade IV germinal matrix and intraventricular hemorrhage (GM-IVH). Echogenic hemorrhage in the third ventricle (arrow) and both lateral ventricles. Echogenic ependymal lining (arrows) and ventricular dilatation begins 1 week after GM-IVH (upper right). cUS on month 1 shows progression of ventricular dilatation (arrows, lower left). cUS on month 2 shows spontaneous improvement in ventricular dilatation without treatment.