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6D85.2Dementia due to exposure to heavy metals and other toxins
International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01
Dementia due to exposure to heavy metals and other toxins caused by toxic exposure to specific heavy metals such as aluminium from dialysis water, lead, mercury or manganese. The characteristic cognitive impairments in Dementia due to exposure to heavy metals and other toxins depend on the specific heavy metal or toxin that the individual has been exposed to but can affect any cognitive domain. Onset of symptoms is related to exposure and progression can be rapid especially with acute exposure. In many cases, symptoms are reversible when exposure is identified and ceases. Investigations such as brain imaging or neurophysiological testing may be abnormal. Lead poisoning is associated with abnormalities on brain imaging including widespread calcification and increased signal on MRI T2-weighted images of periventricular white matter, basal ganglia hypothalamus and pons. Dementia due to aluminium toxicity may demonstrate characteristic paroxysmal high-voltage delta EEG changes. Examination may make evident other features such as peripheral neuropathy in the case of lead, arsenic, or mercury.
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.
postcoordination
Add Stem and/or Extension codes to form a cluster code which adds detail to the condition.
Associated with - multiple selections are allowed
Has severity - only one may be selected
Has causing condition - a selection is required - multiple selections are allowed
synonyms
Dementia due to exposure to heavy metals and other toxins
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