Proximal radio-ulnar synostosis

A proximal radio-ulnar synostosis is an upper limb skeletal malformation characterized by bony fusion at the proximal aspect of the radius and ulna. Of the radio-ulnar synostoses, the proximal third is considered the most common site. 


It is often congenital but can rarely result following trauma. A developmental relationship between posterior dislocation of the radial head and proximal radioulnar fusion has been suggested by some authors.


Several associated conditions have described including1:

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Article information

rID: 13046
Synonyms or Alternate Spellings:
  • Proximal radioulnar synostosis

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Cases and figures

  • Figure 1: illustration of functional difficulties
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  • Radial Ulnar Syno...
    Case 1
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  • Case 2
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  • Proximal radiouln...
    Case 3
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  • Radioulnar synost...
    Case 4
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  •  Case 5: bilateral
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  • Case 6: bilateral
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  • Case 7
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