Location: Usually at the end of long bones (femur, tibia, humerus), involving the epiphysis, both the epiphysis and the metaphysis, or, less frequently, an apophysis. Exceptionally, it can be purely…

Localization: Desmoid fibroma is more frequent in the mandible, long bones, and pelvis. In the long bones, it is more often observed in the meta-diaphysis, but it may be diaphyseal….

High-grade OS varieties 90 % Classic osteosarcoma 75 Telangiectatic 6/7 Of jaw bones 4 Secondary 4

Localization: Any osseous segment may be affected, but the most common sites are the metadiaphyses of the long bones and the spine. Clinical: Pain and swelling generally of less than…

Location: Long bones, metaepiphyseal, and eccentrical: distal femur, proximal tibia, and distal radius (65 % of the cases). Rare in the sacrum and pelvis. When occurring in long bones before…

Chondrosarcomas varieties % Central 55–60 Peripheral 15–20 Dedifferentiated central

Histologically the tumor is very similar to enchondroma, but it more frequently displays features of cell proliferation (high cellularity, nuclear plumpness, and frequent double-nucleated cells). Being somewhat painful and causing…