Lumbar puncture, Memory loss, Lewy body dementia, Encephalitis, Corticobasal syndrome, NMDA receptor antibody encephali...tis, Progressive supranuclear palsy, Dementia, Wernicke-Korsakoff syndrome, Memory changes, Behavioral changes, Primary progressive aphasia, Creutzfeldt Jakob disease, Mild cognitive impairment, Frontotemporal dementia, Autoimmune encephalopathy, Posterior cortical atrophy, Alzheimer's disease