Periosteal Chondrosarcoma
Location: Mainly in the limbs: distal femur, proximal tibia, and proximal humerus. Clinical: Swelling with little or no pain. Imaging: On x-ray – globose mass lying on the outer surface…
Multicentric Osteosarcoma
On radiographs multiple mainly sclerotic lesions are easily detected. The epiphyseal involvement is frequent in this lesion High-grade osteoblastic osteosarcoma usually extensively sclerotic with low cellularity and diminished cytological anaplasia…
Fibromatosis
T2 MR images, coronal of the thigh and sagittal of the foot. The thigh lesion has a low signal and infiltrates the muscles, whereas one in the foot is nodular…
Langerhans Cell Histiocytosis
Location: Flat and short bones of the trunk: skull (parietal, frontal site), ribs, pelvis, vertebral body, clavicle, and scapula. Among long bones: proximal half of the femur, humerus, and tibia…
Central Chondrosarcoma
Localization: Proximal femur, pelvis, proximal humerus, scapula, and proximal tibia. In long bones, it starts metaphyseal extending as far as half or more of the entire bone. Clinical: Deep, discontinuous,…
Dedifferentiated Chondrosarcoma
Location: Proximal femur, pelvis, and proximal humerus. Clinical: On a history of long duration with moderate symptoms, a rapid progression of pain and swelling occurs. Pathologic fractures frequent. Imaging: On…
Chondromyxoid Fibroma
Location: Typically located in the long bone metaphysis, it can invade the epiphysis, especially in adults. Preferred sites proximal tibia (30 % of cases), small bones of the foot, and…
Fibrosarcoma
Localization: The most frequent locations are femur, tibia, humerus, and pelvis. Usually located in the meta-diaphysis, it may invade the epiphysis or be multicentric. Clinical: In low-grade tumors, there is…
Small Cell Osteosarcoma
Round- to ovoid-shaped cells, similar to Ewing sarcoma cells, organized in sheets and nests, with osteoid matrix Selected Bibliography Bertoni F, Present D, Bacchini P, Pignatti G, Picci P, Campanacci…
