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Headache was more severe,esodeviation was more prevalent,and onset was more abrupt in the noncompressive group than in the compressive and iatrogenic groups.Among the 10 patients with noncompressive thrombosis, factors predisposing to thrombosis were present in seven patients but sometimes overlooked.Following treatment,visual outcome was generally favorable in all three groups.All patients had 20/30 or better visual acuity in at least one eye,and substantial visual field loss was present in both eyes of only two patients.The clinical manifestation of impaired cerebral venous outflow vary depending on the underlying mechanism. Although most patients maintain good vision,more aggressive treatment is sometimes indicated in patients with thrombosis or compression.The abrupt onset and marked severity of symptoms in patients with thrombosis should help to differentiate these patients from those with idiopathic intracranial hypertension. |
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