Kosaki overgrowth syndrome

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Kosaki overgrowth syndrome

ORPHA:477831Malformation syndrome

Also called Skeletal overgrowth-craniofacial dysmorphism-hyperelastic skin-white matter lesions syndrome

What it is

A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by postnatal tall stature with long hands and feet, scoliosis, distinctive dysmorphic facial features (prominent forehead, proptosis, downslanting palpebral fissures, broad nasal bridge, thin upper lip, and pointed chin), hyperelastic, thin, and fragile skin, lipodystrophy, and variable intellectual disability and neurological deterioration. Additional reported manifestations include craniosynostosis, camptodactyly, progressive flexion contractures, joint dislocation, and cerebrovascular complications, among others. Brain MRI may show extensive periventricular white matter lesions and other anomalies.

Key facts

Prevalence
<1 / 1 000 000
Age of onset
Infancy
Inheritance
No data available
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.

Gene

PDGFRBDisease-causing germline mutation(s)

ICD-10 codes

Q87.3filed under a broader ICD-10 category — shared with 40 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

MEDDRA 10081313MONDO 0014704OMIM 616592UMLS C4225270

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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