Primary neoplasms of human skeleton are rare, accountingfor 0.2% of overall human tumor burden. Osteosarcoma (OS)accounts for 15 to 35% of all primary bone tumors, in jaw bones,it is even, rarer representing 4 to 8% of all os . Peak incidencefor jaw os is in 3rd to 4th decades while in long bones, it showsa bimodal age distribution. It may occur inside the bones (in theintramedullary or intracortical compartment), on the surfacesof bones and in extraosseous sites. Dental professionals maybe first to detect jaw os in their initial stages. Regardless ofthe favorable biologic behavior, the patients of jaw os usuallyexhibit advanced tumor as it often goes unnoticed thus it isimportant for early diagnosing this lesion. Here, we report2 cases of os with different histological subtypes (chrondroblasticand osteoblastic) and review of literature.
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