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Start free with EleplanMonosomy 5p syndrome
ORPHA:281Malformation syndrome
Also called Cri du chat syndrome · Deletion 5p
What it is
A rare developmental defect during embryogenesis, resulting from partial or total deletion of the short arm of chromosome 5, classically characterized by a high-pitched, monotone, cat-like cry (cri du chat) present since birth, associated with varying degrees of intellectual disability, developmental delay, microcephaly, and facial dysmorphism.
Key facts
- Prevalence
- 1-9 / 100 000 (at birth, Japan)
- Age of onset
- Antenatal
- Inheritance
- Not applicable, Unknown
- Classified as
- Malformation syndrome
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Very common80–99%
12Common30–79%
8These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
Genes
ICD-10 codes
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
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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