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Start free with EleplanSpinocerebellar ataxia-dysmorphism syndrome
ORPHA:1185Disease
What it is
A rare hereditary ataxia characterized by unusual facies (i. e. gross, rough and abundant hair, mild palpebral ptosis, thick lips, and down-curved corners of the mouth), dysarthria, delayed psychomotor development, scoliosis, foot deformities, and ataxia. There have been no further descriptions in the literature since 1985.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Infancy
- Inheritance
- Autosomal recessive
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Very common80–99%
21- Anteverted nares
- Aplasia/Hypoplasia of the cerebellum
- Broad forehead
- Coarse hair
- Cubitus valgus
- Dolichocephaly
- Downturned corners of mouth
- EMG abnormality
- Epicanthus
- Genu recurvatum
- Global developmental delay
- Hyperextensible skin
- Hypotonia
- Joint hypermobility
- Nystagmus
- Proptosis
- Ptosis
- Reduced bone mineral density
- Short nose
- Slender long bone
- Thick vermilion border
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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