Overview
Spinocerebellar ataxia type 21 is a disorder.
Auto-generated from clinical reference data. Not a substitute for medical advice.
Signs & Symptoms
Based on Human Phenotype Ontology (HPO) disease-phenotype annotations.
Ataxia
Always present (100%)HP:0001251
Extrapyramidal syndrome
Very frequent (80-99%)HP:0002071
Inability to coordinate movements when walking
Very frequent (80-99%)HP:0002066
Intermittent microsaccadic pursuits
Very frequent (80-99%)HP:0007944
Progressive cerebellar ataxia
Very frequent (80-99%)HP:0002073
Agraphia
Frequent (30-79%)HP:0010526
Akinesia
Frequent (30-79%)HP:0002304
Atrophic cerebellum
Frequent (30-79%)HP:0001272
Behavioural disorders
Frequent (30-79%)HP:0000708
Cerebellar tremor
Frequent (30-79%)HP:0002080
Cognitive delay
Frequent (30-79%)HP:0001263
Difficulty articulating speech
Frequent (30-79%)HP:0001260
Hypermetric saccades
Frequent (30-79%)HP:0007338
Intellectual deterioration
Frequent (30-79%)HP:0001268
Intellectual impairment
Frequent (30-79%)HP:0100543
Involuntary, rapid, rhythmic eye movements
Frequent (30-79%)HP:0000639
Low intelligence
Frequent (30-79%)HP:0001249
Muscle rigidity
Frequent (30-79%)HP:0002063
Postural tremor
Frequent (30-79%)HP:0002174
Tremor
Frequent (30-79%)HP:0001337
Vermian atrophy
Frequent (30-79%)HP:0006855
Delayed CNS myelination
Occasional (5-29%)HP:0002188
Double vision
Occasional (5-29%)HP:0000651
Dystonic disease
Occasional (5-29%)HP:0001332
Impulsivity
Occasional (5-29%)HP:0100710
Opsoclonus
Occasional (5-29%)HP:0010543
Squint
Occasional (5-29%)HP:0000486
Appendicular ataxia
HP:0002070
Cogwheel rigidity
HP:0002396
Explosive speech
HP:0002168
Quick Facts
- SNOMED CT
- 718774001
- UMLS CUI
- C1843891
- Fully Specified Name
- Spinocerebellar ataxia type 21 (disorder)
- Specialists
- 0
- Diagnostic Biomarkers
- 0
- HPO Phenotypes
- 30
Medical Disclaimer
This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider regarding any medical condition or treatment plan.
Clinical content is derived from the SNOMED CT clinical ontology and curated medical knowledge graphs.