Alzheimer’s Disease / Lewy Body DementiaALSHerpes Simplex Encephalitis (HSV)Huntington DiseaseLead poisoningMultiple SclerosisNeuro-myelitis Optica (NMO) / Devic DiseasePosterior reversible encephalopathy syndrome (PRES)Primary Headache DisordersSubacute combined degeneration (B12 deficiency)Transverse MyelitisWernicke encephalopathy / Korsakoff syndromeOther Rare Disorders