Radiology Key

Localization: It is most commonly localized in the long bones, femur, tibia, and humerus. It prevails in the metaphyses and metaepiphyses, although a purely diaphyseal location may be seen. There…

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…

Location: Epiphysis or apophysis of long bones (proximal femur and humerus), flat, and short bones. Clinical: Modest pain. Imaging: On x-ray, like a chondroblastoma. Osteolytic lesion with small calcifications, sharp…

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…

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…

Radiograph at onset and two months later, bone scintigraphy. Lytic heterogeneous broken lesion involving the epiphysis and metaphysis. The thick lamellar cortex indicates a preexisting Paget disease, confirmed by widespread…

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,…

Localization: It prevalently occurs in the appendicular skeleton, while it is rare in the trunk, with the exception of the spine (mostly localized in the posterior arch). In the limbs,…

Localization: The most frequent localization is in the long bones: distal femur, proximal humerus, and proximal tibia. It originates from the metaphysis, but, with skeletal growth, it tends to move…