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Ring chromosome 13 is a chromosomal anomaly of chromosome 13 characterized by a widely variable phenotype (ranging from mild to severe) principally characterized by intrauterine growth retardation, developmental delay, short stature, moderate to severe intellectual deficit, microcephaly, facial dysmorphism (i.e. upslanting palpebral fissures, hypertelorism, abnormal ears, broad nasal bridge, high arched palate, micrognathia, small mouth, and thin lips), hands and feet anomalies, and genital abnormalities. Additional features reported include behavioral problems, hearing and speech disorders, congenital heart defects, cerebral malformations, and anal atresia.
Estimated prevalence: Unknown (Unknown prevalence).
No clinical trials have been registered for ring chromosome 13.
16 publications have been identified in PubMed for ring chromosome 13. Kisho has analyzed 9 by research type. Research spans Clinical Trial Publication (78%), Case Report / Case Series (11%), and Basic Science / Preclinical (11%).
Zupančič Ž (2025). [PMID: 40925524](https://pubmed.ncbi.nlm.nih.gov/40925524/). *Am J Clin Nutr*. [Clinical Trial Publication]
van Lieshout GAA (2025). [PMID: 40441386](https://pubmed.ncbi.nlm.nih.gov/40441386/). *J Nutr*. [Clinical Trial Publication]
Boot N (2025). [PMID: 41101508](https://pubmed.ncbi.nlm.nih.gov/41101508/). *J Nutr*. [Clinical Trial Publication]
Aussieker T (2025). [PMID: 39501478](https://pubmed.ncbi.nlm.nih.gov/39501478/). *Med Sci Sports Exerc*. [Clinical Trial Publication]
Aussieker T (2025). [PMID: 40523226](https://pubmed.ncbi.nlm.nih.gov/40523226/). *Med Sci Sports Exerc*. [Clinical Trial Publication]
Data assembled from 3 of 12 sources · Last updated Sep 19, 2026, 3:30 AM UTC
European rare disease database
Genetic and Rare Diseases Info Center
Mostovoy Y (2024). [PMID: 39520989](https://pubmed.ncbi.nlm.nih.gov/39520989/). *Am J Hum Genet*. [Basic Science / Preclinical]
Arentson-Lantz EJ (2024). [PMID: 39396760](https://pubmed.ncbi.nlm.nih.gov/39396760/). *J Nutr*. [Clinical Trial Publication]
Pinckaers PJ (2024). [PMID: 37972895](https://pubmed.ncbi.nlm.nih.gov/37972895/). *J Nutr*. [Clinical Trial Publication]