# XYY syndrome

> genetic condition in which a male has an extra Y chromosome

**Wikidata**: [Q267602](https://www.wikidata.org/wiki/Q267602)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/XYY_syndrome)  
**Source**: https://4ort.xyz/entity/xyy-syndrome


## References

1. Monarch Disease Ontology release 2018-06-29
2. Freebase Data Dumps. 2013
3. Orphanet
4. [Source](https://cdn.who.int/media/docs/default-source/classification/icd/icd-10/icd-10-to-meddra-map---june-2023---codes-mapping.xlsx)
5. Genetic and Rare Diseases Information Center
6. Great Norwegian Encyclopedia