LD90.1 Early-onset parkinsonism - intellectual deficit

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2026-01


Early-onset parkinsonism with intellectual deficit is a basal ganglia disorder characterised by parkinsonian-type symptoms (postural changes, tremor, rigidity), megalencephaly and variable intellectual deficit. Other signs are frontal bossing, persistent frontal lobe reflexes, strabismus and seizures.

synonyms

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