Most common CNS manifestation of HIV Infection is:
HIV Encephalopathy also called HIV - Associated dementia or AIDS dementia.
 
This is generally a late complication of HIV infection, it can be seen patients with CD4 count >350 cells.
 
HIV encephalopathy is a sub-cortical dementia while
 
.• Alzheimer's is a cortical dementia
 
Alzheimer's disease is the most common cause of dementia in elderly.
 
Most important risk factor for Alzheimer'^ disease is age
Acute Meningitis
Encephalopathy
Vacuolar myelopathy
Dementia