<prompt> Which of the following is associated with hyperdensities in sulcal spaces,basal cisterns and anterior hemispheric fissure?Subdural hematomaExtradural hematomaSubarachnoid hematomaintraparenchymal bleed  <response>: Subarachnoid Hemorrhage Bleeding in area between arachnoid and piamater mambranes subarachnoid space Usually presents with sudden onset of severe headache worst headache of life. mostly around the circle of willis. mcc of SAH is head trauma. Diagnosis :- On NCCT shows Hyperdensities in sulcal spaces,Syln fissure, Basal cisterns and Anterior interhemispheric fissure. Xanthochromia of CSF is indicative of SAH; if CT scan is negative. IOC for Acute SAH48 hrs- NCCT IOC for Chronic SAH48hrs- MRI Management :- Tripple H therapy HypeensionHypervolemia and Hemodilution is used to treat and prevent cerebral vasospasm after aneurysmal subarachnoid hemorrhageSAH. Repair of aneurysm- endovascular coiling and surgical clipping. 