A 44 year old female with a severe headache is seen in the Emergency department. She has no prior history of headaches. She has some neck stiffness and prefers the darkened room.
An LP is performed, which shows:Macroscopic appearance: Turbid
Protein 0.63 g/l (0.14-0.45)
Glucose 3.9 mmol/l (2.8-4.4)
Microscopy No bacteria seen
Culture No growth
A culture is continuing
Sample WCC RCC
1 750 290
2 837 72
3 855 45
List 3 possible differentials and your most likely cause
Describe the 4 key abnormalities to help narrow your differential
What other tests would you request to aid in your management?