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Non-progressive cerebellar ataxia with intellectual deficit is a rare subtype of autosomal dominant cerebellar ataxia type 1 (ADCA type 1) characterized by the onset in infancy of cerebellar ataxia, neonatal hypotonia (in some), mild developmental delay and, in later life, intellectual disability. Less common features include dysarthria, dysmetria and dysmorphic facial features (long face, bulbous nose long philtrum, thick lower lip and pointed chin).
Features include always present findings: Mild intellectual disability, Global developmental delay, and Hippocampal atrophy; and very common findings: Bulbous nose, Broad forehead, Unsteady gait, and Delayed speech and language development. 62 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 17 | Bilateral tonic-clonic seizure, Mild intellectual disability, Seizure |
Muscles | 5 | Cerebral cortical atrophy, Hippocampal atrophy, Axial hypotonia |
Head and neck | 4 | High palate, Thick lower lip vermilion, Macrocephaly |
Arms and legs | 3 | 2-4 toe cutaneous syndactyly, 2-3 toe cutaneous syndactyly, Hand tremor |
Digestive system | 2 | Gastroesophageal reflux, Chronic constipation |
Eyes | 1 | Strabismus |
Growth and development | 1 | Short stature |
Bones and joints | 1 | Sideways curvature of the spine (scoliosis) |
Pregnancy and birth | 1 | Neonatal hypotonia |
CAMTA1 encodes calmodulin binding transcription activator 1 (1,673 aa). Transcriptional activator Highest expression in Brain Cerebellar Hemisphere (52.8 TPM) and Brain Cerebellum (35.2 TPM).
Cerebellar dysfunction with variable cognitive and behavioral abnormalities is caused by mutations in the CAMTA1 gene on chromosome 1.
CAMTA1 is classified as a druggable target (Clinically Actionable and Transcription Factor categories) with score 0.0.
Genetic testing for CAMTA1 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for cerebellar dysfunction with variable cognitive and behavioral abnormalities has been reported in the published literature.
Phenotype severity distribution: 3 always present features, 4 very common features, 35 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for cerebellar dysfunction with variable cognitive and behavioral abnormalities.
22 publications have been identified in PubMed for cerebellar dysfunction with variable cognitive and behavioral abnormalities. Research spans Case Report / Case Series (68%), Diagnostic / Biomarker (9%), and Review / Meta-Analysis (9%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 15 | 68% |
Testing and diagnosis research | 2 | 9% |
Research summaries | 2 | 9% |
Laboratory research | 1 | 5% |
Disease patterns and progression | 1 | 5% |
New treatment approaches | 1 | 5% |
Terman E (2026). [PMID: 41909052](https://pubmed.ncbi.nlm.nih.gov/41909052/). *Frontiers in child and adolescent psychiatry*. [Review / Meta-Analysis]
Peter B (2026). [PMID: 40891523](https://pubmed.ncbi.nlm.nih.gov/40891523/). *American journal of medical genetics. Part A*. [Case Report / Case Series]
Ahmad S (2026). [PMID: 41649149](https://pubmed.ncbi.nlm.nih.gov/41649149/). *Clinical dysmorphology*. [Case Report / Case Series]
Johari M (2026). [PMID: 41678358](https://pubmed.ncbi.nlm.nih.gov/41678358/). *Brain : a journal of neurology*. [Case Report / Case Series]
Lee SY (2026). [PMID: 40921433](https://pubmed.ncbi.nlm.nih.gov/40921433/). *Clinical genetics*. [Case Report / Case Series]
Jawabri AA (2026). [PMID: 42051465](https://pubmed.ncbi.nlm.nih.gov/42051465/). *Hum Mutat*. [Case Report / Case Series]
Liu F (2026). [PMID: 41562293](https://pubmed.ncbi.nlm.nih.gov/41562293/). *Mov Disord*. [Diagnostic / Biomarker]
Kalayinia S (2025). [PMID: 39931767](https://pubmed.ncbi.nlm.nih.gov/39931767/). *Molecular genetics & genomic medicine*. [Case Report / Case Series]
Maroofian R (2025). [PMID: 40879451](https://pubmed.ncbi.nlm.nih.gov/40879451/). *Movement disorders : official journal of the Movement Disorder Society*. [Case Report / Case Series]
Türkdoğan D (2025). [PMID: 39704271](https://pubmed.ncbi.nlm.nih.gov/39704271/). *Movement disorders : official journal of the Movement Disorder Society*. [Case Report / Case Series]
Data assembled from 7 of 12 sources · Last updated Sep 20, 2026, 2:11 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center