This person had pain and swelling in the distal third of the arm

This person had pain and swelling in the distal third of the arm.
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:dart:Xrays: Exaggerated radial inclination, “V-shaped” proximal carpal row, dorsal dislocation of the ulnar head.
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:dart:The Madelung deformity is a growth disorder of the forearm that is associated with a characteristic deformity. It is caused by reduced growth of the distal radial epiphysis with a mismatch to the relatively longer healthy grown ulna. In other words, a part of the radius stops growing early. The ulna keeps growing and can dislocate, forming a bump. In the case of Madelung deformity, the mobility of the wrist is limited. Dorsiflexion and ulnar abduction are restricted. There is usually no pain.