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Which condition may cause similar clinical symptoms, but has a nearly opposite aetiology?
Ulnar impaction syndrome (in positive ulnar variance).
What may be the causes of a shortened ulna?
1. Madelung's deformity 2. Postoperative conditions 3. Developmental negative ulnar variance
Bone oedema, joint space narrowing, osteophytes and a geode at the ulnar aspect of the distal radioulnar joint in a case of negative ulnar variance, clinically known as ulnar impingement syndrome.