Carpenter syndrome

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Carpenter syndrome

ORPHA:65759Malformation syndrome

Also called ACPS2 · Acrocephalopolysyndactyly type 2

What it is

A rare syndromic craniosynostosis with variable phenotypic expression characterized by craniosynostosis, intellectual disability, distinctive facies, abnormalities of the fingers and toes (brachydactyly, polydactyly and syndactyly), short stature, congenital heart disease, skeletal defects, obesity, genital abnormalities and umbilical hernia.

Key facts

Prevalence
<1 / 1 000 000
Age of onset
Antenatal, Childhood, Neonatal
Inheritance
Autosomal recessive
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

These 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

MEGF8Disease-causing germline mutation(s)
RAB23Disease-causing germline mutation(s) (loss of function)

ICD-10 codes

Q87.0filed under a broader ICD-10 category — shared with 154 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

GARD 6003MEDDRA 10081310MESH C563187MONDO 0019012OMIM 201000OMIM 614976UMLS C1275078

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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