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Temtamy syndrome is a very rare congenital genetic neurological disorder characterized by agenesis/hypoplasia of corpus callosum with developmental abnormalities, ocular disorders, and variable craniofacial and skeletal abnormalities.
Features include always present findings: Seizure and Global developmental delay; and common findings: Hypertonia, Agenesis of corpus callosum, Microphthalmia, and Chorioretinal coloboma. 34 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 4 | Mild intellectual disability, Seizure, Enlarged brain ventricles (ventriculomegaly) |
Heart and blood vessels | 2 | Aortic regurgitation, Aortic aneurysm |
Muscles | 1 | Low muscle tone (hypotonia) |
Arms and legs | 1 | Short 2nd toe |
Head and neck | 1 | Long face |
Eyes | 1 | Lens luxation |
C12ORF57 encodes chromosome 12 open reading frame 57 (126 aa). In brain, may be required for corpus callosum development Highest expression in Ovary (287.8 TPM) and Cervix Ectocervix (274.8 TPM).
Temtamy syndrome is associated with mutations in the C12ORF57 gene on chromosome 12.
C12ORF57 is classified as a druggable target with score 0.0.
Genetic testing for C12ORF57 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for temtamy syndrome has been reported in the published literature.
Phenotype severity distribution: 2 always present features, 4 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for temtamy syndrome.
22 publications have been identified in PubMed for temtamy syndrome. Research spans Case Report / Case Series (59%), Review / Meta-Analysis (23%), and Epidemiology / Natural History (9%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 13 | 59% |
Research summaries | 5 | 23% |
Disease patterns and progression | 2 | 9% |
Testing and diagnosis research | 1 | 5% |
Laboratory research | 1 | 5% |
El Fid K (2026). [PMID: 42003052](https://pubmed.ncbi.nlm.nih.gov/42003052/). *Pediatr Dermatol*. [Case Report / Case Series]
Zhang Y (2026). [PMID: 41727761](https://pubmed.ncbi.nlm.nih.gov/41727761/). *Front Pediatr*. [Case Report / Case Series]
Kerkeni N (2026). [PMID: 41556146](https://pubmed.ncbi.nlm.nih.gov/41556146/). *Birth Defects Res*. [Case Report / Case Series]
Warmoeskerken T (2026). [PMID: 41821414](https://pubmed.ncbi.nlm.nih.gov/41821414/). *Am J Med Genet A*. [Case Report / Case Series]
Kubiszewski H (2026). [PMID: 41904990](https://pubmed.ncbi.nlm.nih.gov/41904990/). *Adv Clin Exp Med*. [Review / Meta-Analysis]
Kayhan G (2026). [PMID: 41751633](https://pubmed.ncbi.nlm.nih.gov/41751633/). *Genes (Basel)*. [Epidemiology / Natural History]
Papaioannou E (2026). [PMID: 42238158](https://pubmed.ncbi.nlm.nih.gov/42238158/). *Cureus*. [Case Report / Case Series]
Löbel U (2025). [PMID: 39393841](https://pubmed.ncbi.nlm.nih.gov/39393841/). *AJNR Am J Neuroradiol*. [Diagnostic / Biomarker]
da Silva Campos TA (2025). [PMID: 40751225](https://pubmed.ncbi.nlm.nih.gov/40751225/). *J Med Case Rep*. [Case Report / Case Series]
Xue S (2025). [PMID: 41240171](https://pubmed.ncbi.nlm.nih.gov/41240171/). *Mol Biol Rep*. [Case Report / Case Series]
Data assembled from 6 of 12 sources · Last updated Sep 20, 2026, 3:01 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center