Autoimmune encephalitis caused by autoantibodies against intracellular neuronal proteins
Typically not limited to<unk>  system
Majority of cases are paraneoplastic, particularly associated with small cell lung cancer, germ-cell testicular tumors, teratomas
Limbic encephalitis
Hypoxic encephalopathy
Japanese encephalitis
Acute toxic-metabolic encephalopathy 
Anti-NMDA receptor encephalitis
Hypoglycemia
Drug induced aseptic meningitis
Hyperosmolar state 