Presentation
Wrist deformity.
Patient Data
Age: 5 years
Gender: Male
From the case:
Pseudo-Madelung deformity - hereditary multiple exostoses
![](https://prod-images-static.radiopaedia.org/images/59645298/3533b738d8fc3849bb3e404705ed9d5110d797ad6afb916c245f642d6c534e82_thumb.jpeg)
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![](https://prod-images-static.radiopaedia.org/images/59645298/3533b738d8fc3849bb3e404705ed9d5110d797ad6afb916c245f642d6c534e82_big_gallery.jpeg)
Sessile osteochondroma of the volar surface of the distal ulna. No other osteochondroma is seen.
Negative ulnar variance. Outward bowing of the radial shaft. Increased radial inclination (ulnar tilt) of the distal radial articular surface giving a pseudo-Madelung deformity.
Case Discussion
This patient had a history of hereditary multiple exostoses, which is one of the causes of a pseudo-Madelung deformity.