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Cerebro-oculo-nasal syndrome is a multisystem malformation syndrome that has been reported in about 10 patients. The clinical features include bilateral anophthalmia, abnormal nares, central nervous system anomalies, and neurodevelopmental delay.
Features include always present findings: Proboscis, Sparse eyebrow, Broad forehead, and Global developmental delay; and very common findings: Hypertelorism, Postnatal growth retardation, Enlarged brain ventricles (ventriculomegaly), and Optic nerve hypoplasia. 45 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Head and neck | 7 | Narrow palate, U-Shaped upper lip vermilion, High palate |
Phenotype severity distribution: 4 always present features, 4 very common features, 5 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for cerebrooculonasal syndrome.
1 publication has been identified in PubMed for cerebrooculonasal syndrome. Research spans Gene Therapy / Novel Therapeutics (100%).
Hazan F (2025). [PMID: 41404552](https://pubmed.ncbi.nlm.nih.gov/41404552/). *Mol Syndromol*. [Gene Therapy / Novel Therapeutics]
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 10:55 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Brain and nerves |
5 |
Seizure, Hydrocephalus, Enlarged brain ventricles (ventriculomegaly) |
Eyes | 2 | Optic nerve hypoplasia, Ptosis |
Growth and development | 1 | Postnatal growth retardation |
Arms and legs | 1 | Postaxial hand polydactyly |
Ears | 1 | Conductive hearing impairment |