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A group of autosomal recessive skeletal ciliopathies that are characterized by a constricted thoracic cage, short ribs, shortened tubular bones, and a 'trident' appearance of the acetabular roof.
Features include always present findings: Fibular hypoplasia, Anal atresia, Wide anterior fontanel, and Decreased calvarial ossification and others; and common findings: Complete atrioventricular canal defect, Septate vagina, Natal tooth, and Tetralogy of Fallot. 42 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Head and neck | 2 | Cleft lip, Cleft palate |
INTU encodes inturned planar cell polarity protein (942 aa). Plays a key role in ciliogenesis and embryonic development. Highest expression in Ovary (12.0 TPM) and Nerve Tibial (11.8 TPM).
Short-rib thoracic dysplasia 20 with polydactyly is associated with mutations in the INTU gene on chromosome 4.
INTU is classified as a druggable target (Cell Surface category) with score 52.2.
Genetic testing for INTU is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 15 always present features, 4 common features.
No clinical trials have been registered for short-rib thoracic dysplasia 20 with polydactyly.
1 publication has been identified in PubMed for short-rib thoracic dysplasia 20 with polydactyly. Research spans Case Report / Case Series (100%).
Singh S (2024). [PMID: 38702430](https://pubmed.ncbi.nlm.nih.gov/38702430/). *Eur J Hum Genet*. [Case Report / Case Series]
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 8:42 AM UTC
Online Mendelian Inheritance in Man
Bones and joints |
2 |
Hypoplastic pubic bone, Short long bone |
Lungs and breathing | 1 | Pulmonary hypoplasia |
Digestive system | 1 | Esophageal diverticulum |
Brain and nerves | 1 | Depressed nasal bridge |
Age of onset: at birth.