MRI of aggressive bone lesions of childhood.

MRI can yield valuable information about involvement of bone and soft tissue by aggressive bone lesions of childhood. The 18 lesions evaluated with MRI included osteosarcoma, Ewing's sarcoma, histiocytosis, osteomyelitis, osteoblastoma, giant cell tumor, aneurysmal bone cyst, ossifying fibroma, and fibrous dysplasia. In 12 children, where CT correlation was available, MRI provided equal or more information than CT. Our study shows that MRI should be the modality of choice in the evaluation of aggressive bone lesions of childhood, after conventional radiography.