This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CT SCAN, Subject name: Radiology
CT scan of the head should be performed before lumbar puncture in all of the following conditions except? 
Select and explain. 
A. Hypeension, B. Immunocompromised state, C. Kernohan Woltman sign, D. Low GCS score
A: Hypeension
Answer: A: Hypeension 
Explanation: Neuroimaging should be done prior to LP in the following patients: 1. Altered level of consciousness 2. Focal neurological deficit 3. New onset seizure 4. Papilledema 5. Immunocompromised state These patients are at increased risk of potentially fatal cerebellar or tentorial herniation following lumbar puncture.