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Fibrochondrogenesis is a rare, neonatally lethal, rhizomelic chondrodysplasia. Eleven cases have been reported. The face is distinctive and characterized by protuberant eyes, flat midface, flat small nose with anteverted nares and a small mouth with long upper lip. Cleft palate, micrognathia and bifid tongue can occur. The limbs show marked shortness of all segments with relatively normal hands and feet. No internal anomalies other than omphalocele have been reported. Transmission is probably autosomal recessive. Recurrence in a consanguineous family (affecting both sexes) and concordance of affected male twins have been reported.
Features include very common findings: Wide anterior fontanel, Round face, Short neck, and Proptosis and others; and common findings: Narrow mouth, Cleft palate, Hearing abnormality, and Low-set ears and others. 29 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Head and neck | 2 | Cleft palate, Round face |
Phenotype severity distribution: 14 very common features, 10 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for fibrochondrogenesis.
6 publications have been identified in PubMed for fibrochondrogenesis. Research spans Basic Science / Preclinical (67%) and Case Report / Case Series (33%).
Yuan W (2026). [PMID: 41665948](https://pubmed.ncbi.nlm.nih.gov/41665948/). *JCI Insight*. [Basic Science / Preclinical]
Kwan KYC (2025). [PMID: 40428164](https://pubmed.ncbi.nlm.nih.gov/40428164/). *Bioengineering (Basel)*. [Basic Science / Preclinical]
Li H (2025). [PMID: 40060143](https://pubmed.ncbi.nlm.nih.gov/40060143/). *Bioact Mater*. [Basic Science / Preclinical]
Peschaut T (2025). [PMID: 39981533](https://pubmed.ncbi.nlm.nih.gov/39981533/). *Case Rep Ophthalmol*. [Case Report / Case Series]
Ai L (2025). [PMID: 40623448](https://pubmed.ncbi.nlm.nih.gov/40623448/). *Osteoarthritis Cartilage*. [Basic Science / Preclinical]
Wu J (2024). [PMID: 38684309](https://pubmed.ncbi.nlm.nih.gov/38684309/). *Zhonghua Yi Xue Yi Chuan Xue Za Zhi*. [Case Report / Case Series]
Data assembled from 4 of 12 sources · Last updated Sep 19, 2026, 11:53 AM UTC
European rare disease database
Genetic and Rare Diseases Info Center
Arms and legs
2 |
Hypoplastic fingernail, Camptodactyly of finger |
Ears | 1 | Hearing abnormality |
Lungs and breathing | 1 | Difficulty breathing (respiratory insufficiency) |
Bones and joints | 1 | Abnormal form of the vertebral bodies |
Growth and development | 1 | Short stature |
Brain and nerves | 1 | Depressed nasal bridge |