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Mosaic trisomy 5 is a rare chromosomal anomaly syndrome with a variable phenotype ranging from clinically normal to patients presenting intrauterine growth retardation, congenital heart anomalies (mainly ventricular septal defect), multiple dysmorphic features (e.g. hypertelorism, prominent nasal bridge) and other congenital anomalies (incl. eventration of diaphragm, agenesis of corpus callosum, cloverleaf skull, clinodactyly, anteriorly placed anus). Psychomotor development may be normal in spite of low growth parameters being associated.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for mosaic trisomy 5.
4 publications have been identified in PubMed for mosaic trisomy 5. Research spans Review / Meta-Analysis (75%) and Case Report / Case Series (25%).
Koyuncuoglu MA (2025). [PMID: 41078617](https://pubmed.ncbi.nlm.nih.gov/41078617/). *Mol Syndromol*. [Review / Meta-Analysis]
Belabbes KB (2024). [PMID: 39479571](https://pubmed.ncbi.nlm.nih.gov/39479571/). *Int J Pediatr*. [Review / Meta-Analysis]
Konya M (2024). [PMID: 39499701](https://pubmed.ncbi.nlm.nih.gov/39499701/). *PLoS One*. [Review / Meta-Analysis]
Chen CP (2024). [PMID: 39482006](https://pubmed.ncbi.nlm.nih.gov/39482006/). *Taiwan J Obstet Gynecol*. [Case Report / Case Series]
Data assembled from 3 of 12 sources · Last updated Sep 19, 2026, 12:49 AM UTC
European rare disease database
Genetic and Rare Diseases Info Center