The authors present the case of a 16-year-old boy with osteochondroma of the iliac crest which gradually resulted in gluteal muscle atrophy, developing curvature of the spine and compression of the external iliac artery. Osteochondroma excision prevented the development of circulatory disorders in the ipsilateral lower extremity, and effective physical therapy enabled the well cooperating patient to restore fully his gluteal muscle strength and normal gait pattern