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Isolated cerebellar vermis hypoplasia is a rare, non-syndromic cerebellar malformation characterized by an underdeveloped cerebellar vermis. Patients may present a variable phenotype ranging from normal neurodevelopment to motor and/or language delay, variable degrees of cognitive impairment, hypotonia, equilibrium disturbances, static/dynamic ataxia, oculomotor abnormalities, epilepsy and/or clumsiness. Behavioral disorders such as attention deficit hyperactivity disorder and generalized anxiety have also been reported. Brain MRI may reveal diffuse or selective (mostly posterior) vermian cerebellar hypoplasia and EEG may show focal paroxysms.
No clinical trials have been registered for isolated cerebellar vermis hypoplasia.
8 publications have been identified in PubMed for isolated cerebellar vermis hypoplasia. Research spans Review / Meta-Analysis (63%) and Case Report / Case Series (38%).
Bremond-Gignac D (2026). [PMID: 41455383](https://pubmed.ncbi.nlm.nih.gov/41455383/). *J Fr Ophtalmol*. [Review / Meta-Analysis]
Ito M (2026). [PMID: 41809274](https://pubmed.ncbi.nlm.nih.gov/41809274/). *Cureus*. [Case Report / Case Series]
Corrêa DG (2025). [PMID: 41423717](https://pubmed.ncbi.nlm.nih.gov/41423717/). *J Clin Ultrasound*. [Review / Meta-Analysis]
Arechvo A (2025). [PMID: 40101304](https://pubmed.ncbi.nlm.nih.gov/40101304/). *Pediatr Neurol*. [Review / Meta-Analysis]
Cutillo G (2025). [PMID: 40100516](https://pubmed.ncbi.nlm.nih.gov/40100516/). *Cerebellum*. [Review / Meta-Analysis]
Parisi N (2025). [PMID: 40785453](https://pubmed.ncbi.nlm.nih.gov/40785453/). *Ultrasound Obstet Gynecol*. [Review / Meta-Analysis]
Data assembled from 3 of 12 sources · Last updated Sep 19, 2026, 4:25 PM UTC
European rare disease database
Genetic and Rare Diseases Info Center
Baskan GN (2024). [PMID: 38845182](https://pubmed.ncbi.nlm.nih.gov/38845182/). *Neurologist*. [Case Report / Case Series]
Kim O (2024). [PMID: 39360439](https://pubmed.ncbi.nlm.nih.gov/39360439/). *J Child Neurol*. [Case Report / Case Series]