Cerebral venous sinus stenosis has been reported in up to 90% of patients with IIH.
Repeat studies after normalization of the intracranial pressure demonstrated normalization of this finding.
The cerebral sinus narrowing might be a consequence of the increased intracranial pressure. However, venous sinus narrowing/thrombosis could cause increased intracranial pressure as well. This situation could represent the chicken or egg debate as to which occurs first 1).