Positive ulnar variance

Last revised by Andrew Murphy on 01 Aug 2020

Positive ulnar variance describes where the distal articular surface of the ulna is more distal when compared to the articular surface of the radius.

It plays important role in wrist pathology such as ulnar impaction syndromes and thinning of the triangular fibrocartilage complex.

Radiographic features

Maximum forearm pronation results in an increase in positive ulnar variance, whereas maximum forearm supination decreases ulnar variance 1.

See also

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Cases and figures

  • Figure 1: positive ulnar variance
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  • Case 1
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  • Case 2
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  • Case 3
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