1. 6-month-old girl with a Dandy-Walker malformation and aqueductal stenosis.A, Sagittal MR ventriculogram shows intense contrast in the left lateral and third ventricles.
6-month-old girl with a Dandy-Walker malformation and aqueductal stenosis.A, Sagittal MR ventriculogram shows intense contrast in the left lateral and third ventricles. The anterior recesses of the third ventricle (white arrow) and the massa intermedia (black arrow) are clearly visible. There is a thin trickle of contrast material in the cerebral aqueduct, indicating a relative stenosis. The asterisk (*) indicates the posterior fossa cyst.B, Coronal MR ventriculogram shows intense contrast in the body of the left lateral ventricle, third ventricle, and the left temporal horn. Contrast in the right lateral ventricle is of less intensity (X).C, Axial MR ventriculogram shows contrast in the third ventricle (arrow) and the left temporal horn (arrowhead). Contrast of less intensity fills the right temporal horn. The posterior fossa cyst (*) has no contrast.D, Axial MR ventriculogram shows intense contrast in the anteroinferior part of the third ventricle (white arrow) and temporal horn of the left lateral ventricle, and a thin trickle of contrast material in the cerebral aqueduct (black arrow) entering the posterior fossa cyst (*)‏
Vivek B. Joseph et al. AJNR Am J Neuroradiol 2003;24:
©2003 by American Society of Neuroradiology