Humero-radial synostosis

What is Humero-radial synostosis?

Humero-radial synostosis is a rare, genetic, congenital joint formation defect disorder characterized by uni- or bilateral fusion of the humerus and radius bones at the elbow level, with or without associated ulnar and carpal/metacarpal deficiency, leading to loss of elbow motion and, in many cases, functional arm incapacity. Bowing of radius may be additionally present.

Other condition names

  • Humero-radial fusion

Inheritance type

Autosomal dominant, Autosomal recessive


  • Worldwide: <1 in 1,000 000

Age of Onset

  • Antenatal
  • Neonatal
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