Figure 2From: Aqueductal developmental venous anomaly as an unusual cause of congenital hydrocephalus: a case report and review of the literature Postnatal T1-weighted axial and sagittal MRI with gadolinium at three days of life demonstrates a patent aqueduct of Sylvius, but a developmental venous anomaly (white arrow) extending from the left thalamus converging on a central draining vein bridges across the proximal orifice of the aqueduct of Sylvius and obstructs the aqueduct.Back to article page