What does this CT scan show?

  • Hyperdense blood in the subarachnoid space in keeping with subarachnoid haemorrhage:
    • Widely distributed within the basal cisterns, Sylvian and interhemispheric fissures
    • Results in classical “star sign” distribution with blood distributed around ‘circle of Willi’s and along basal vessels
  • Loss of grey-white matter differentiation