Intracranial venous collaterals in XXXX : clinical and imaging impact.

@entity1 @entity101 @entity75 @entity49 @entity164 @entity1211
BACKGROUND AND PURPOSE: Few studies have examined collateral formation in @entity1 with @entity49 ( @entity49 ). The aim of this study was to analyse the impact of baseline intracranial venous collaterals on the clinical outcome and imaging features of @entity1 with acute @entity49 . MATERIAL AND METHODS: MRIs from consecutive @entity1 with acute @entity49 were retrospectively analysed. The category system described by Qureshi was used to assess the pattern of venous collaterals. Clinical and imaging features and outcomes were analysed using bivariate and multivariate models to assess the association of collateral patterns with the type of parenchymal lesions and clinical outcome (modified Rankin Scale) at 30 and 90   days. RESULTS: One hundred @entity1 were included (77 @entity1 ; median age 32   years; and median of 18   months of follow-up). @entity1211 were present in 88% of the @entity1 ; type I collaterals in 3 @entity1 , type II collaterals in 27 @entity1 , and @entity164 in 58 @entity1 . Twelve @entity1 did not exhibit any collaterals. Cohen's k coefficient between evaluators was 0.86. In the bivariate analysis, @entity164 were associated with isolated intracranial @entity101 and complete recovery, whereas type I collaterals were associated with @entity75 . However, in the multivariate regression analysis, the collateral pattern was not associated with clinical presentation, type of @entity75 or outcome. CONCLUSIONS: Intracranial venous collaterals are frequently found in @entity1 with @entity49 during the acute phase. However, they do not have an independent effect on the type of @entity75 , clinical manifestations or prognosis.
