ICD-11 Criteria for Dementia Due to Lewy Body Disease (6D82)
Dementia preceding or occurring
within one year after the onset of motor parkinsonian signs in the setting of
Lewy body disease. Characterized by presence of Lewy bodies, which are
intraneuronal inclusions containing α-synuclein and ubiquitin in the brain
stem, limbic area, forebrain, and neocortex. Onset is insidious with
attentional and executive functioning deficits often present. These cognitive
deficits are often accompanied by visual hallucinations and symptoms of REM
sleep behaviour disorder. Hallucinations in other sensory modalities,
depressive symptoms, and delusions may also be present. The symptom presentation
usually varies significantly over the course of days necessitating longitudinal
assessment and differentiation from delirium. Spontaneous onset of Parkinsonism
within approximately 1 year of the onset of cognitive symptoms is common.
Coding
Note: This
category should never be used in primary tabulation. The codes are provided for
use as supplementary or additional codes when it is desired to identify the
presence of dementia in diseases classified elsewhere.
When dementia is due to multiple aetiologies, code all that apply.
REFERENCE:
International Classification of Diseases Eleventh Revision (ICD-11). Geneva: World Health Organization; 2022. License: CC BY-ND 3.0 IGO.
https://creativecommons.org/licenses/by-nc-nd/3.0/igo/
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