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X small rings is a rare chromosome X structural anomaly, with highly variable phenotype, principally characterized by developmental delay, intellectual disability, short stature, craniofacial dysmorphism (incl. microcephaly, facial asymmetry, hypertelorism, long palpebral fissures, epicanthus, low-set or malrotated ears, broad nose with a flat nasal bridge, anteverted nares, long philtrum, thin upper lip, high arched palate, micrognathia) and skeletal anomalies (e.g. cubitus valgus, talipes equinovarus). Patients may also present heart malformations (e.g. ventricular septal defects, mitral valve stenosis), sacral dimple, soft tissue syndactyly, pigmented nevi, and seizures.
Biomarker and diagnostic research for X small rings has been reported in the published literature.
No clinical trials have been registered for X small rings.
50 publications have been identified in PubMed for X small rings. Research spans Basic Science / Preclinical (88%), Diagnostic / Biomarker (6%), and Epidemiology / Natural History (4%).
Research Type | Count | % of Total |
|---|---|---|
Laboratory research | 44 | 88% |
Data assembled from 3 of 12 sources · Last updated Sep 18, 2026, 7:12 PM UTC
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about X small rings
3 |
6% |
Disease patterns and progression | 2 | 4% |
Research summaries | 1 | 2% |
Bruystens JGH (2026). [PMID: 42096309](https://pubmed.ncbi.nlm.nih.gov/42096309/). *Proc Natl Acad Sci U S A*. [Basic Science / Preclinical]
McCabe P (2026). [PMID: 41684228](https://pubmed.ncbi.nlm.nih.gov/41684228/). *J Chem Inf Model*. [Basic Science / Preclinical]
Galizia N (2026). [PMID: 41710329](https://pubmed.ncbi.nlm.nih.gov/41710329/). *ACS Appl Nano Mater*. [Basic Science / Preclinical]
Nord MT (2026). [PMID: 42164443](https://pubmed.ncbi.nlm.nih.gov/42164443/). *Chem Sci*. [Basic Science / Preclinical]
Buth J (2026). [PMID: 41589487](https://pubmed.ncbi.nlm.nih.gov/41589487/). *Dalton Trans*. [Basic Science / Preclinical]
Bao L (2026). [PMID: 41842339](https://pubmed.ncbi.nlm.nih.gov/41842339/). *Langmuir*. [Basic Science / Preclinical]
Gupta RJ (2026). [PMID: 41708669](https://pubmed.ncbi.nlm.nih.gov/41708669/). *Sci Rep*. [Basic Science / Preclinical]
Knospe CV (2025). [PMID: 40634635](https://pubmed.ncbi.nlm.nih.gov/40634635/). *Commun Biol*. [Basic Science / Preclinical]
Doménech-Carbó MT (2025). [PMID: 40649298](https://pubmed.ncbi.nlm.nih.gov/40649298/). *Molecules*. [Basic Science / Preclinical]
Sinha A (2025). [PMID: 39942316](https://pubmed.ncbi.nlm.nih.gov/39942316/). *Materials (Basel)*. [Basic Science / Preclinical]