The most common locations are the shaft and epyphises of long bones (fibula and humerus) but the spine, metatarsal bones, and ilium have been involved as well. Radiologic examination evidences osteolytic areas with a lobulated framework comprising radiolucent and radiodense foci admixed to speckled calcification. Cortical destruction is a common finding with no soft tissue expansion in many cases. Histopathology of the lesion shows large areas of mature fibrous stroma undergoing hyaline cartilage metaplasia resulting in conspicuous lobules or gradual transformation into chondroid foci. Both hyaline cartilage and chondroid in turn undergo calcification and endochondral cancellous bone formation mimicking epiphyseal plate-like cartilage. Differential diagnosis is concerned with<unk>  dysplasia of bone, desmoplastic fibroma, low-grade fibrosarcoma, chondromyxoid fibroma and low-grade chondrosarcoma. A full account of imaging findings on radiography, bone scan, CT and magnetic resonance has been provided by Sumner et al.
Fibrocartilaginous mesenchymoma of bone
Juvenile active ossifying fibroma
Peripheral ossifying fibroma
Osteoblastoma
Solitary fibrous tumor
Malignant ectomesenchymoma
Giant-cell tumor of bone
Aneurysmal bone cyst