The prevalence of known solitary exostosis is\naround 1ââ?¬â??2 % in the general population. Treatment of an\nexostosis may consist of resection with or without further\ntreatment for deformity. The distal radioulnar joint (DRUJ)\nacts as the link between radius and ulna at the wrist and is\nimportant in the transmission of load. Its anatomic integrity\nshould be respected in surgical procedures or ulnar-sided\nwrist pain because of instability, limitation of forearm rotation\nand potential development of grip weakness may\ndevelop. We present a case of reconstruction of the DRUJ\nwith distraction lengthening of the ulna after resection of a\nlarge exostosis of the distal radius that had resulted in a\nmalformed and dysplastic ulna. This treatment in a young\npatient resulted in a stable, functional and congruent distal\nradioulnar joint.
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