DEMONSTRATION OF MEMBRANOUS AQUEDUCT OCCLUSION BY FAST MULTIPHASE MAGNETIC-RESONANCE-IMAGING

Membranous aqueduct occlusion is one of the few causes of obstructive hydrocephalus that is amenable to direct surgical treatment. Conventio nal diagnostic methods may not delineate this entity. The advent of dy namic fast multiphase magnetic resonance imaging has improved the defi nition of the aqueductal membrane by enabling visualization of the obs tructed cerebrospinal fluid flow within the ventricular system. We rep ort a case of a 10-year-old boy in whom the diagnosis of membranous aq ueduct occlusion was only achieved utilizing this new technique.