الفهرس 
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Abstract
Idiopathic intracranial hypertension (IIH) is a clinical syndrome characterized by increased ICP without a detectable cause. TS stenosis has been recently reported to be found in 65–90% of patients with IIH. This study highlights the grading of transverse sinus stenosis in patients with idiopathic intracranial hypertension using MRV. The study was performed on 96 of clinically suggested IIH cases (75 females and 21 males) with their mean age 31.3 ± 13.4, ranging from 4 to 65 years and mean BMI was 30.7 ± 7, ranging from 15 (a boy aged 4-years) to 45 kg / m2 In this study, headache was the most common symptom (87.5%) and papilledema is the most encountered sign (66.7%). Papilledema had symmetrical grades in most of our cases (90.6%), and only a minority (11.2%) showed asymmetrical grades. MRV of dural sinuses is the technique of choice for non-invasive visualization of TS stenosis. For all our cases, we performed MRV: non-contrast (either TOF or PC) and contrast enhanced techniques for detecting and analyzing TS stenosis with a specific scoring scale “Combined conduit score (CCS)”. As regards the MRV findings (TS stenosis) in our cases were : - For laterality: Unilateral stenosis in 42 cases (43.8%), and bilateral stenosis in 11 cases (11.5%) 43 cases while no stenosis in 43 cases (44.7%). - For grading on each side in cases with stenosis : There was rather similar distribution of MRV grading on either side with most cases have grade 4, while grade 0 was observed in 2 cases (1 RT. and 1 LT.), grade 1 was observed in 12.5% on right side vs. 17.7% on left side, grade 2 was observed in 12.5% on right side vs. 7.3% on left side, and grade 3 was observed in 8.3% on right side vs. 6.3% on left side.