Subarachnoid Hemorrhage

  • Etiology: traumatic resulting in blood between arachnoid membrane and pia mater
  • Imaging: faint collections of hemorrhage in the subarachnoid space, often associated with subdural hematoma and cerebral contusion
  • Complications: vasospasm and stroke

Cases of Subarachnoid Hemorrhage

CT of cerebral edema and subarachnoid hemorrhage
Axial CT without contrast of the brain shows diffuse low density through the bilateral cerebral hemispheres (anteriorly) with a normal density cerebellum (posteriorly) that appears relatively hyperdense when compared to the cerebral density. Subarachnoid hemorrhage was also seen bilaterally in the basal cisterns.