Paternal uniparental disomy of chromosome…

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Paternal uniparental disomy of chromosome 21 syndrome

ORPHA:96195Malformation syndrome

Also called UPD(21)pat

What it is

Paternal uniparental disomy of chromosome 21 is an uniparental disomy of paternal origin that most likely does not have any phenotypic expression except from cases of homozygosity for a recessive disease mutation for which only father is a carrier.

Key facts

Age of onset
Antenatal, Neonatal
Classified as
Malformation syndrome

ICD-10 codes

Q99.8filed under a broader ICD-10 category — shared with 42 other rare diseases

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references

MONDO 0019925UMLS C4707801

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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