Histopathological Variants of Jaw Osteosarcoma

Osteosarcoma (OS) is a highly malignant bone forming tumor characterized by frankly to subtly anaplastic stromal cells with evidence of direct formation of osteoid and/or primitive bone by these cells. Incidence is lower in jaws as compared to long bones (4-13%). They have different biological behaviour but same histopathology. The mean age of occurrence is third to fourth decade, almost a decade older than that of osteosarcoma of long bones. The most common presenting features are pain and swelling, with a radiographic presentation of sunburst appearance. The histopathology of osteosarcoma is highly variable, ranging from the more commonly seen osteoblastic type to the rare variants like myxomatous and telangiectatic types among others. The histopathological diversities of jaw osteosarcoma are being presented in the following three cases.