Premature infant with Dandy walker variant suggested on head ultrasound. There is hypoplasia of the right cerebellar hemisphere and inferior cerebellar vermis, with associated linear susceptibility effect, which likely represents a development venous anomaly. There is relatively deficient myelination in the bilateral peri-Rolandic regions. The brain parenchyma, brainstem, and pituitary gland otherwise appear unremarkable. There is no evidence of intracranial hemorrhage, mass, or acute infarct. Aside from deficiency of parenchymal along the right posterolateral aspect of the fourth ventricle, the ventricles are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
1. Hypoplasia of the right cerebellar hemisphere and inferior cerebellar vermis, with what may represent an associated developmental venous anomaly.2. Relatively deficient myelination in the bilateral peri-Rolandic regions may be commensurate with prematurity.