[Wrist joint deformities caused by multiple cartilaginous exostoses of the distal ulna]

On the basis of follow-up examinations it was found that exostoses at the distal ulna often result in shortening of the ulna and curvation of the radius. The resulting deformation of the wrist joint is particularly common in girls with exostoses which are over 7 mm wide and affect the ulnar epiphyseal cartilage. Particularly in the period of growth before puberty the progress of the deformation is considerable. Thus, female patients of group 3 in particular have to be examined carefully; in many cases surgery is necessary, in order to prevent further deformation and possibly even destruction of the radio-ulnar joint.