Resolution of transverse sinus stenoses immediately after CSF withdrawal in idiopathic intracranial hypertension

[...]CSF withdrawal reduces venous sinus pressures, implying that venous hypertension is a secondary phenomenon. 1 Moreover, resolution of transverse sinus stenoses has been reported in three patients with IIH treated by CSF diversion procedures. 2, 3 We report a patient with IIH in whom catheter and CT venography showed transverse sinus stenoses which resolved immediately after CSF withdrawal by lumbar puncture (LP). King et al showed that the pressure gradients across transverse sinus stenoses in IIH resolved after CSF drainage. 1 Subsequently, investigators using magnetic resonance and CT venography have shown that transverse sinus stenoses in IIH can resolve after CSF diversion procedures.