CASE HISTORY
Katherine Zhang, a 47 year old woman, was hurrying for a bus when she experienced a sudden violent headache and collapsed.
She was assisted by a bystander, who noted that she was conscious but confused and in pain.
An ambulance was called and she was taken to hospital.
En route to hospital she vomited several times.
List some possible differential diagnoses for this presentation
What other symptoms and signs are also suggestive of aSAH? List some below.