Cerebral venous sinus thrombosis overview

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Sharmi Biswas, M.B.B.S

Overview

Cerebral venous thrombosis(CVT)is thrombosis of cerebral veins, a rare form of stroke which is different from arterial strokes. CVT incidence is 1.3 in per 1,00,000/year in developed countries. Young children and women especially pregnant/puerperium have a higher frequency of CVT. Due to the wide spectrum of clinical features, CVT frequently gets misdiagnosed as other strokes. Commonly known risk factors and causes of cerebral venous thrombosis are venous thromboembolism, thrombophilia (especially antithrombin deficiency, protein C and S deficiency and factor V Leiden mutation), pregnancy, oestrogen therapy/oral contraceptives, hypercoagulability as part of inflammatory disease, head trauma, local infections and underlying cancer. Pathophysiology of CVT includes two mechanisms including thrombosis of cerebral veins creating local edema and venous infarction; intracranial hypertension created by increased venous pressure and decreased absorption of CSF. Clinical presentations of CVT can be categorized into 4 categories as isolated intracranial hypertension, neurological deficits, encephalopathy and seizure. Symptoms related to increased intracranial hypertension are headache, diplopia, papilledema, sixth nerve palsy and decreased consciousness; focal neurological deficits present as motor and sensory impairments, aphasia.

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