Major Neurocognitive Disorder (Lewy Body Dementia)

Progressive cognitive decline occurs with core features such as fluctuating cognition, recurrent visual hallucinations, REM sleep behavior disorder, or spontaneous parkinsonism.

Timing requirement

Longitudinal course

Progressive course; no fixed minimum

Timing in context

Probable disease generally requires 2 core features, or 1 core feature plus an indicative biomarker.

Sources and review

Last content review: August 21, 2026