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Disease definition

Sclerosteosis is a very rare serious sclerosing hyperostosis syndrome characterized clinically by variable syndactyly and progressive skeletal overgrowth (particularly of the skull), resulting in distinctive facial features (mandibular overgrowth, frontal bossing, midfacial hypoplasia), cranial nerve entrapment causing facial palsy and deafness, and potentially lethal elevation of intracranial pressure.


Classification level: Disorder
  • Synonym(s):
    • Cortical hyperostosis-syndactyly syndrome
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Neonatal, Childhood
  • ICD-10: M85.2
  • OMIM: 269500  614305
  • UMLS: C0265301
  • MeSH: C537525
  • GARD: 4771
  • MedDRA: -

Detailed information


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