Figure 1

Manifestations of multiple osteochondromas (MO) in a patient. A, Photograph of a 7-year-old patient with MO demonstrates marked forearm deformities. B, In his radiograph, the most common type of deformity is seen: a combination of relative shortening of the ulna, bowing of the radius and ulna, increased ulnar tilt of the distal radial epiphysis, and ulnar deviation of the hand (Courtesy of Mikel San Julian, MD, Department of Orthopaedic Surgery and Traumatology, University Clinic of Navarra, Pamplona, Spain).