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Ramon syndrome

Disease definition

A rare, genetic, primary bone dysplasia syndrome characterized by bilateral, painless swelling of the face extending from the mandible to the inferior orbital margins (cherubism), epilepsy, gingival fibromatosis (possibly obscuring teeth), and intellectual disability. Other associated variable features include hypertrichosis, stunted growth, juvenile rheumatoid arthritis, and development of ocular abnormalities (e.g. pigmentary retinopathy, optic disc pallor, Axenfeld anomaly). Radiological images typically show bilateral multifocal radiolucency involving the body, angle and ramus of the mandible and coronoid process.


Classification level: Disorder
  • Synonym(s):
    • Cherubism-gingival fibromatosis-intellectual disability syndrome
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Infancy
  • ICD-10: Q87.8
  • OMIM: 266270
  • UMLS: C0796133
  • MeSH: C535285
  • GARD: 7523
  • MedDRA: -

Detailed information


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