Musculoskeletal trauma in children.

MR imaging has facilitated the study of pediatric injuries by demonstrating the extraosseous and cartilaginous component of these lesions. In injuries to the epiphysis and physis, osteochondral injuries and avulsion injuries, the cartilaginous component is usually the most important part of the lesion. Stress fractures and other injuries to the marrow also can be demonstrated with MR imaging. In the context of musculoskeletal injuries in children, MR imaging is most valuable in demonstrating the extent of injuries to radiographically occult areas.