Down syndrome

chromosomal condition
Thing disability Q47715
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Summary

Down syndrome is a disability[1]. It draws 30,869 Wikipedia views per month (disability category, ranking #3 of 7).[2]

Key Facts

  • Instance of: class of disease[3]
  • Named after: John Langdon Down[4]
  • Subclass of: chromosomal disease[5], trisomy[6], total autosomal trisomy[7], otitis[8]
  • Commons category: Down syndrome[9]
  • Said to be the same as: Mongolian idiocy[10]
  • ICPC 2 ID: A90[11]
  • Symptoms and signs: otitis media[12], obstructive sleep apnea[13], heart disease[14], intellectual disability[15]
  • Has cause: trisomy[16]
  • Topic's main category: Category:Down syndrome[17]
  • Chromosome: human chromosome 21[18]
  • Prevalence: 0.001[19]
  • ICD-9-CM: 758.0[20]
  • NCI Thesaurus ID: C2993[21]
  • Health specialty: medical genetics[22], neurology[23]
  • Genetic association: human chromosome 21[24]
  • Exact match: http://purl.obolibrary.org/obo/DOID_14250[25], http://identifiers.org/doid/DOID:14250[26]
  • On focus list of Wikimedia project: WikiProject Medicine[27], Wikipedia:Vital articles/Level/4[28]
  • Chromosome count: 47[29]

Body

Influence

Things named for Down syndrome include World Down Syndrome Day[30], a world day[31], founded in 2006[32].

Why It Matters

Down syndrome has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[33] It is known by 149 alternative names across languages and contexts.[34]

Entities named for it include World Down Syndrome Day[30], a world day[31], founded in 2006[32].

References

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

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.
  26. [28] ↑ . wikidata.org.
  27. [29] ↑ . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [30] ↑ . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [31] ↑ . Wikidata. wikidata.org. → on this site
  2. [32] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [33] ↑ . Wikidata sitelinks. wikidata.org.
  3. [34] ↑ . 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). Down syndrome. Retrieved October 13, 2026, from https://4ort.xyz/entity/down-syndrome
MLA “Down syndrome.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Oct. 2026, https://4ort.xyz/entity/down-syndrome.
BibTeX @misc{4ortxyz_down-syndrome_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Down syndrome}}, year = {2026}, url = {https://4ort.xyz/entity/down-syndrome}, note = {Accessed: 2026-10-13}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Down syndrome — https://4ort.xyz/entity/down-syndrome (retrieved 2026-10-13)

Canonical URL: https://4ort.xyz/entity/down-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. 5w ago · Rose Abrams · 2026-09-08 view diff on Wikidata ↗
    Dagens nyheter topic id → downs-syndrom
    "/* wbsetclaim-create:1||1 */ Dagens nyheter topic id: downs-syndrom, Matched to [[:toollabs:mix-n-match/#/entry/62008342|Downs syndrom (#62008342)]] in [[:toollabs:mix-n-match/#/catalog/488|DN topic]]"
  2. 11w ago · Kirilloparma · 2026-07-25 view diff on Wikidata ↗
    P14470 → Concepts/Down_Syndrome
    "/* wbsetclaim-create:1||1 */ P14470: Concepts/Down_Syndrome, Adding missing [[P:P14470|P14470]] and [[P:P9675|P9675]] qualifier based on [[P:P5247|P5247]]"
  3. 13w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 2BinPA
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  4. 14w ago · Susmuffin · 2026-07-08 view diff on Wikidata ↗
    Harper's tag → down-syndrome
    "/* wbsetclaim-create:1||1 */ Harper's tag: down-syndrome, Matched to [[:toollabs:mix-n-match/#/entry/289932333|down syndrome (#289932333)]] in [[:toollabs:mix-n-match/#/catalog/7915|Harper's ta"
  5. 14w ago · JhealdBatch bot · 2026-07-03 view diff on Wikidata ↗
    Subclass of → chromosomal disease, trisomy, total autosomal trisomy +1
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/39732|batch #39732]]: rm redundant subclass"
  6. 18w ago · Jindřich Rubeš · 2026-06-11 view diff on Wikidata ↗
    Svkkl authority id → h0000904-Downuv-syndrom
    "/* wbcreateclaim-create:1| */ Svkkl authority id: h0000904-Downuv-syndrom, [[:toollabs:quickstatements/#/batch/259496|batch #259496]]"
  7. 21w ago · Twofivesixbot bot · 2026-05-19 view diff on Wikidata ↗
    Symptoms and signs → otitis media, obstructive sleep apnea, heart disease +1
    "/* wbsetclaim-update-qualifiers:1||1|8 */ Yso id: 4177, mv to monolingual text names on YSO statements"
  8. 21w ago · Sabrina2026 · 2026-05-15 view diff on Wikidata ↗
    Chromosome → human chromosome 21
    Subclass of → —
    Has cause → trisomy, trisomy
    Said to be the same as → Mongolian idiocy
    + 13 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ Subclass of: otitis"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.