Presentation
Chronic headaches. A VP shunt was inserted 5 years ago and removed 3 years later (surgical report not available).
Patient Data
Marked dilatation of the 3rd and lateral ventricles with a vascular structure obstructing the proximal portion of the aqueduct of Sylvius seen as a developmental venous anomaly on postcontrast T1 sequences as well as on sagittal T1 and T2 as a signal void vascular structure. Normal size and configuration of the 4th ventricle.
Right frontal gliosis probably along the removed VP shunt.
Case Discussion
MRI features of obstructive hydrocephalus due to a developmental venous anomaly obstructing the proximal portion of the cerebral aqueduct (of Sylvius).
Aqueductal stenosis caused by a developmental venous anomaly is very rare, only a few cases were reported in the literature 1,2.
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