 The cerebellar transverse diameter is within normal limits. There is slight prominence of the foramen of Magendie outflow and posterior fossa CSF. The posterior fossa is not enlarged and the vermis is not upturned. There is no hydrocephalus. The corpus callosum and cavum septum pellucidum are present. Gyral development is appropriate for gestational age. There is no cerebellar tonsillar herniation. There is no evidence of intracranial hemorrhage or midline lipoma.
Mild prominence of the 4th ventricular outflow tract which may reflect mild hypoplasia of the inferior vermis, a mild manifestation of the Dandy-Walker spectrum, or normal variation. There is no evidence of classic Dandy-Walker malformation. 