Female predominance (up to 80-90%)
Predominantly in children and young adults, however can be found at any age
Viral like prodrome (headache, low-grade fever, malaise)
Psychiatric manifestations (anxiety, agitation, bizarre behavior, hallucinations, etc) and/or decreased level of consciousness 
Dyskinesia, movement disorders and increased rigidity
Autonomic instability: hyperthermia, tachycardia/bradycardia, BP fluctuations, hypoventilation
Lethargy, seizures
Abnormality in vitals as above, rarely may find abdominal mass
Anti-NMDA receptor encephalitis
Viral encephalitis
CMV neurologic disease
Neuroleptic malignant syndrome
Limbic encephalitis
Primary psychiatric disorder
Primary CNS lymphoma
Hyper/hypothyroidism