Klinefelter's syndrome

human chromosomal condition
MedicalCondition developmental_defect_during_embryogenesis Q207133
Klinefelter's syndrome
User:Nami-ja · Public Domain · Wikimedia
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Summary

Klinefelter's syndrome is a developmental defect during embryogenesis[1]. It ranks in the top 0.97% of developmental defect during embryogenesis entities by monthly Wikipedia readership (16,741 views/month, #3 of 308).[2]

Key Facts

  • Instance of: class of disease[3]
  • Named after: Harry Klinefelter[4]
  • Subclass of: chromosomal disease[5], sex chromosome disorder[6], X chromosome number anomaly with male phenotype[7], male infertility due to gonadal dysgenesis[8], sex chromosome disorder of sex development[9], chromosomal anomaly with epilepsy as a major feature[10], chromosomal duplication syndrome[11], disease[12], intersex variation[13]
  • Commons category: Klinefelter's syndrome[14]
  • Time of discovery or invention: 1942[15]
  • Symptoms and signs: azoospermia[16], hypogonadism[17], gynecomastia[18], obesity[19], osteoporosis[20], muscle weakness[21], dyslexia[22]
  • ICD-9-CM: 758.7[23]
  • NCI Thesaurus ID: C34752[24]
  • Different from: XYY syndrome[25]
  • Health specialty: medical genetics[26]
  • Drug or therapy used for treatment: testosterone[27]
  • Exact match: http://purl.obolibrary.org/obo/DOID_1921[28], http://identifiers.org/doid/DOID:1921[29]
  • On focus list of Wikimedia project: WikiProject Medicine[30]
  • WordLift URL: http://data.medicalrecords.com/medicalrecords/healthwise/male_with_klinefelter_syndrome[31]

Why It Matters

Klinefelter's syndrome has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[32] It is known by 88 alternative names across languages and contexts.[33]

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] ↑ . Disease Ontology. Retrieved . wikidata.org.
  4. [6] ↑ . A case of human intersexuality having a possible XXY sex-determining mechanism. wikidata.org.
  5. [7] ↑ . Monarch Disease Ontology release 2018-06-29. Retrieved . wikidata.org.
  6. [8] ↑ . Monarch Disease Ontology release 2018-06-29. Retrieved . wikidata.org.
  7. [9] ↑ . Monarch Disease Ontology release 2018-06-29. Retrieved . wikidata.org.
  8. [10] ↑ . Monarch Disease Ontology release 2018-06-29. Retrieved . wikidata.org.
  9. [11] ↑ . Disease Ontology. Retrieved . 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] ↑ . Disease Ontology. Retrieved . wikidata.org.
  22. [24] ↑ . Disease Ontology. Retrieved . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . Drug Indications Extracted from FAERS. Retrieved . wikidata.org.
  26. [28] ↑ . Disease Ontology. Retrieved . wikidata.org.
  27. [29] ↑ . Identifiers.org. registry.identifiers.org. Provenance: wikidata.org.
  28. [30] ↑ . wikidata.org.
  29. [31] ↑ . medicalrecords.com. medicalrecords.com. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [32] ↑ . Wikidata sitelinks. wikidata.org.
  3. [33] ↑ . 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). Klinefelter's syndrome. Retrieved October 11, 2026, from https://4ort.xyz/entity/klinefelter-s-syndrome
MLA “Klinefelter's syndrome.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Oct. 2026, https://4ort.xyz/entity/klinefelter-s-syndrome.
BibTeX @misc{4ortxyz_klinefelter-s-syndrome_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Klinefelter's syndrome}}, year = {2026}, url = {https://4ort.xyz/entity/klinefelter-s-syndrome}, note = {Accessed: 2026-10-11}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Klinefelter's syndrome — https://4ort.xyz/entity/klinefelter-s-syndrome (retrieved 2026-10-11)

Canonical URL: https://4ort.xyz/entity/klinefelter-s-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. 13w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 23Bi6M
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  2. 14w ago · JhealdBatch bot · 2026-07-04 view diff on Wikidata ↗
    Subclass of → chromosomal disease, sex chromosome disorder, X chromosome number anomaly with male phenotype +6
    Instance of → developmental defect during embryogenesis, class of disease
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/39915|batch #39915]]: rm redundant disease superclass"
  3. 14w ago · JhealdBatch bot · 2026-07-03 view diff on Wikidata ↗
    Subclass of → chromosomal disease, sex chromosome disorder, X chromosome number anomaly with male phenotype +6
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/39732|batch #39732]]: rm redundant subclass"
  4. 20w ago · Twofivesixbot bot · 2026-05-18 view diff on Wikidata ↗
    Instance of → —
    Named after → Harry Klinefelter
    Health specialty → medical genetics
    Subclass of → —
    + 9 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|6 */ Yso id: 21958, mv to monolingual text names on YSO statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.