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A rare developmental defect during embryogenesis syndrome characterized by Robin sequence (micrognathia, glossoptosis, and cleft palate), atrial septal defect, persistence of the left superior vena cava, and talipes equinovarus. The phenotype is variable, some patients present with further dysmorphic characteristics (e.g. hypertelorism, ear abnormalities) while others do not have any key findings. Additional features, such as syndactyly, polydactyly, or brain anomalies (e.g. cerebellar hypoplasia), have also been reported. The syndrome is almost invariably lethal with affected males either dying prenatally or living just a few months.
Features include very common findings: Talipes equinovarus, Atrial septal defect, Pierre-Robin sequence, and Persistent left superior vena cava; and common findings: Meckel diverticulum, Hepatic failure, Low muscle tone (hypotonia), and Glossoptosis and others. 70 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 5 | Seizure, Global developmental delay, Intellectual disability |
Muscles | 3 | Low muscle tone (hypotonia), Generalized hypotonia, Damage to the optic nerve (optic atrophy) |
Arms and legs | 3 | Rocker bottom foot, Hand polydactyly, Finger syndactyly |
Growth and development | 2 | Failure to thrive, Intrauterine growth retardation |
Head and neck | 2 | High palate, Cleft palate |
Lungs and breathing | 2 | Apnea, Pulmonary hypoplasia |
Digestive system | 1 | Hepatic failure |
Kidneys and urinary system | 1 | Horseshoe kidney |
Skin | 1 | Tongue nodules |
Eyes | 1 | Damage to the optic nerve (optic atrophy) |
Heart and blood vessels | 1 | Atrial septal defect |
Ears | 1 | Hearing loss (hearing impairment) |
Bones and joints | 1 | Sideways curvature of the spine (scoliosis) |
RBM10 function has not been fully characterized.
TARP syndrome is caused by mutations in the RBM10 gene on chromosome X.
Genetic testing for RBM10 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 4 very common features, 23 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for TARP syndrome.
6 publications have been identified in PubMed for TARP syndrome. Research spans Review / Meta-Analysis (60%) and Case Report / Case Series (40%).
Mekinian A (2026). [PMID: 40787890](https://pubmed.ncbi.nlm.nih.gov/40787890/). *Arthritis Rheumatol*. [Review / Meta-Analysis]
Guterman S (2025). [PMID: 40213872](https://pubmed.ncbi.nlm.nih.gov/40213872/). *Mol Genet Genomic Med*. [Review / Meta-Analysis]
Boccara O (2025). [PMID: 39885577](https://pubmed.ncbi.nlm.nih.gov/39885577/). *Orphanet J Rare Dis*. [Review / Meta-Analysis]
Abeer F (2025). [PMID: 40881541](https://pubmed.ncbi.nlm.nih.gov/40881541/). *Cureus*. [Case Report / Case Series]
Rahman F (2025). [PMID: 39668186](https://pubmed.ncbi.nlm.nih.gov/39668186/). *Eur J Hum Genet*. [Case Report / Case Series]
Data assembled from 7 of 12 sources · Last updated Sep 20, 2026, 11:14 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about TARP syndrome