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Oral-facial-digital syndrome, type 4 is characterized by lingual hamartoma, postaxial polysyndactyly of hands and feet, and mesomelic shortening of the legs with supinate equinovarus feet.
Features include very common findings: Hypertelorism, Micrognathia, Low-set ears, and Abnormality of the tongue and others; and common findings: Cleft palate, Submucous cleft hard palate, Bifid uvula, and Proptosis and others. 87 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Arms and legs | 10 | Toe syndactyly, Hand polydactyly, Short finger |
Head and neck | 8 | Cleft palate, High palate, Median cleft upper lip |
Brain and nerves | 8 | Brain shrinkage (cerebral atrophy), Depressed nasal ridge, Intellectual disability |
Growth and development | 5 | Short stature, Intrauterine growth retardation, Severe short stature |
Muscles | 3 | Brain shrinkage (cerebral atrophy), Cerebral cortical atrophy, Subcortical cerebral atrophy |
Lungs and breathing | 3 | Recurrent respiratory infections, Pulmonary hypoplasia, Bilateral lung agenesis |
Ears | 2 | Conductive hearing impairment, Abnormality of the ear |
Bones and joints | 2 | Abnormal joint morphology, Joint dislocation |
Kidneys and urinary system | 2 | Renal agenesis, Renal hypoplasia/aplasia |
Skin | 1 | Tongue nodules |
Eyes | 1 | Abnormal eye movements (abnormality of eye movement) |
Blood and immune system | 1 | Recurrent respiratory infections |
Digestive system | 1 | Feeding difficulties |
Hormones | 1 | Primary adrenal insufficiency |
TCTN3 function has not been fully characterized.
Orofaciodigital syndrome IV is associated with mutations in the TCTN3 gene on chromosome 10.
Genetic testing for TCTN3 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 42 very common features, 13 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for orofaciodigital syndrome IV.
2 publications have been identified in PubMed for orofaciodigital syndrome IV. Research spans Review / Meta-Analysis (100%).
Lo Giudice M (2025). [PMID: 40565597](https://pubmed.ncbi.nlm.nih.gov/40565597/). *Genes*. [Review / Meta-Analysis]
Deconte D (2024). [PMID: 39063141](https://pubmed.ncbi.nlm.nih.gov/39063141/). *International journal of molecular sciences*. [Review / Meta-Analysis]
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 6:58 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center