Systemic atrophies primarly affecting the central nervous system

Description

myoclonic cerebellar dyssynergia: A condition marked by progressive cerebellar ataxia combined with myoclonus usually presenting in the third decade of life or later. Additional clinical features may include generalized and focal seizures, spasticity, and dyskinesias. Autosomal recessive and autosomal dominant patterns of inheritance have been reported. Pathologically, the dentate nucleus and brachium conjunctivum of the cerebellum are atrophic, with variable involvement of the spinal cord, cerebellar cortex, and basal ganglia. (From Joynt, Clinical Neurology, 1991, Ch37, pp60-1)

Data source
FinnGen phenocode G6_NEUATR
Include G6_HUNTINGTON, G6_HERATAXIA, G6_INFAMUSC, G6_OTHINMUSC, G6_ALS, G6_SPINAMUSCOTH, G6_POSTPOLIO
Level in the ICD-hierarchy 2
First defined in version DF2
Ontology
DOID 12707
GWAS catalog 1001053
MESH D002527
SNOMED CT 73495003

Key figures

Sex All Female Male
Number of individuals 322 148 174
Unadjusted prevalence (%) 0.24 0.2 0.3
Mean age at first event (years) 57.14 56.96 57.28
Median number of events / individual 2 2 2

Clinical metrics

Sex All Female Male
Recurrence within 6 months (%) 50.31 50.68 50.0
Case fatality at 5-years (%) 21.43 23.65 19.54

Associations