fragile X syndrome

congenital disorder of nervous system
MedicalCondition rare_disease Q221472
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Summary

fragile X syndrome is a rare disease[1]. It ranks in the top 3% of rare disease entities by monthly Wikipedia readership (13,295 views/month).[2]

Key Facts

  • Instance of: designated intractable/rare disease[3], class of disease[4]
  • Named after: Julia Bell[5]
  • Subclass of: X-linked intellectual disability[6], overgrowth syndrome[7], X-linked dominant disease[8], syndrome[9]
  • Commons category: Fragile X syndrome[10]
  • Prevalence: 0.00014[11], 0.00009[12]
  • External data available at URL: http://www.nanbyou.or.jp/entry/4612[13]
  • ICD-9-CM: 759.83[14]
  • NCI Thesaurus ID: C84717[15]
  • Health specialty: medical genetics[16], pediatrics[17], neurology[18]
  • Genetic association: FMR1[19]
  • Exact match: http://purl.obolibrary.org/obo/DOID_14261[20], http://identifiers.org/doid/DOID:14261[21]
  • On focus list of Wikimedia project: WikiProject Medicine[22]

Why It Matters

fragile X syndrome has Wikipedia articles in 25 language editions, a strong signal of global cultural recognition.[23] It is known by 48 alternative names across languages and contexts.[24]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . ddrare.nibiohn.go.jp. Retrieved . ddrare.nibiohn.go.jp. Provenance: wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . Disease Ontology. Retrieved . wikidata.org.
  7. [9] ↑ . Disease Ontology. Retrieved . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . cdc.gov. Retrieved . cdc.gov. Provenance: wikidata.org.
  10. [12] ↑ . cdc.gov. Retrieved . cdc.gov. Provenance: wikidata.org.
  11. [13] ↑ . ddrare.nibiohn.go.jp. Retrieved . ddrare.nibiohn.go.jp. Provenance: wikidata.org.
  12. [14] ↑ . Disease Ontology. Retrieved . wikidata.org.
  13. [15] ↑ . Disease Ontology. Retrieved . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . Klinická neurologie část speciální. wikidata.org.
  17. [19] ↑ . Mapping of DNA instability at the fragile X to a trinucleotide repeat sequence p(CCG)n. wikidata.org.
  18. [20] ↑ . Disease Ontology. Retrieved . wikidata.org.
  19. [21] ↑ . Identifiers.org. registry.identifiers.org. Provenance: wikidata.org.
  20. [22] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [23] ↑ . Wikidata sitelinks. wikidata.org.
  3. [24] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). fragile X syndrome. Retrieved October 20, 2026, from https://4ort.xyz/entity/fragile-x-syndrome
MLA “fragile X syndrome.” 4ort.xyz Knowledge Graph, 4ort.xyz, 20 Oct. 2026, https://4ort.xyz/entity/fragile-x-syndrome.
BibTeX @misc{4ortxyz_fragile-x-syndrome_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{fragile X syndrome}}, year = {2026}, url = {https://4ort.xyz/entity/fragile-x-syndrome}, note = {Accessed: 2026-10-20}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): fragile X syndrome — https://4ort.xyz/entity/fragile-x-syndrome (retrieved 2026-10-20)

Canonical URL: https://4ort.xyz/entity/fragile-x-syndrome · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 9d ago · VGMaintenanceBot bot · 2026-10-13 view diff on Wikidata ↗
    Wikipedia languages → ['ar', 'az', 'bs', 'ca', 'commons', 'de', 'el', 'en', 'eo', 'es', 'eu', 'fa', 'f
    Sitelink count → 39
    Claims rich → —
    "/* wbsetqualifier-add:1| */ Mediawiki page id: 1689, Add qualifier to WikiProjectMed ID `Fragile X syndrome`"
  2. 15w ago · JhealdBatch bot · 2026-07-03 view diff on Wikidata ↗
    Subclass of → X-linked intellectual disability, overgrowth syndrome, X-linked dominant disease +1
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/39732|batch #39732]]: rm redundant subclass"
  3. 22w ago · Twofivesixbot bot · 2026-05-18 view diff on Wikidata ↗
    Instance of → rare disease, designated intractable/rare disease, class of disease
    Genetic association → FMR1
    Named after → —
    Health specialty → medical genetics, pediatrics, neurology
    + 7 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|12 */ Yso id: 20030, mv to monolingual text names on YSO statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.