Can initially be confused with depression, anxiety disorders, or substance abuse
Changes in mental status
Aphasia
Motor abnormalities
Patients with an established diagnosis of<unk><unk>  who develop progressive neurologic or psychologic signs or symptoms warrant further evaluation for systemic or CNS processes
AIDS dementia complex
Hypoxic encephalopathy
Anti-NMDA receptor encephalitis
Acute toxic-metabolic encephalopathy 
Prion disease
Hypoglycemia
HIV neurologic complications
Hyperosmolar state 