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Features include always present findings: Gray matter heterotopia, Partial agenesis of the corpus callosum, Enlarged brain ventricles (ventriculomegaly), and Polymicrogyria and others; and very common findings: Cerebellar dysplasia and Arachnoid cyst. 15 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 4 | Mild intellectual disability, Seizure, Hydrocephalus |
GPSM2 encodes G protein signaling modulator 2 (684 aa). Plays an important role in mitotic spindle pole organization via its interaction with NUMA1. Required for cortical dynein-dynactin complex recruitment during metaphase. Highest expression in Brain Spinal cord cervical c-1 (20.9 TPM) and Skin Sun Exposed Lower leg (19.3 TPM).
Chudley-McCullough syndrome is caused by mutations in the GPSM2 gene on chromosome 1.
The GPSM2 protein participates in GPSM1, GPSM3,(GPSM2, PCP2) pathway.
GPSM2 is classified as a druggable target with score 0.0.
Genetic testing for GPSM2 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for Chudley-McCullough syndrome has been reported in the published literature.
Phenotype severity distribution: 5 always present features, 2 very common features, 3 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for Chudley-McCullough syndrome.
5 publications have been identified in PubMed for Chudley-McCullough syndrome. Research spans Case Report / Case Series (60%), Diagnostic / Biomarker (20%), and Epidemiology / Natural History (20%).
Boerboom RA (2026). [PMID: 41503747](https://pubmed.ncbi.nlm.nih.gov/41503747/). *Cochlear implants international*. [Case Report / Case Series]
Ouqlani C (2026). [PMID: 41323166](https://pubmed.ncbi.nlm.nih.gov/41323166/). *Radiology case reports*. [Case Report / Case Series]
Bharadwaj T (2025). [PMID: 40371963](https://pubmed.ncbi.nlm.nih.gov/40371963/). *Clinical genetics*. [Epidemiology / Natural History]
Janky KL (2025). [PMID: 40420514](https://pubmed.ncbi.nlm.nih.gov/40420514/). *Journal of the American Academy of Audiology*. [Diagnostic / Biomarker]
Couto R (2025). [PMID: 40923892](https://pubmed.ncbi.nlm.nih.gov/40923892/). *Radiology*. [Case Report / Case Series]
Data assembled from 7 of 12 sources · Last updated Sep 19, 2026, 3:32 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about Chudley-McCullough syndrome
Ears |
1 |
Severe sensorineural hearing impairment |
Age of onset: childhood.