A RARE PRESENTATION OF CEREBRAL VENOUS SINUS THROMBOSIS AS SUBARACHNOID HAEMORRHAGE

Previously ,Subarachnoid Haemorrhage (SAH) is most often due to aneurysmal rupture.Other vascular lesions are known to rarely cause SAH.Cerebral venous sinus thrombosis(CVT) can be difficult to diagnose because of its wide spectrum of clinical manifestations.Its diagnosis can be further complicated when patients initially present with acute SAH.We report a rare presentation of CVT as SAH.We report a case of 40years old female patient presented with acute onset of severe headache with vomiting.Computerised Tomography(CT) contrast brain showed SAH in the basal cistern.Digital Subtraction Angiography (DSA)was done to detect the cause of SAH which was normal.Magnetic Resonance Imaging(MRI) of brain was done which showed thrombus in the superior,inferior sagital sinuses,Transverse sinus and sigmoid sinus on both sides.Patient improved with anticoagulant therapy.This case highlights the fact that SAH may reveal a CVT, and emphasizes on the inclusion of Magnetic Resonance Venography(MRV) in the diagnostic workup of SAH,particularly in cases in which aneurysm is not detected.