Giant Osteosarcoma of the Mandible.

Osteosarcoma is a rare primary malignant bone tumor with considerable variations not only in clinical and histologic appearance, but also in the course and prognosis of the disease. It mainly occurs in the metaphyseal region of long bones. Jaw osteosarcomas are relatively rare as compared to those occurring in long bones and share similar histopathologic features, but biologically behave in a different manner. Early diagnosis and complete resection of the lesion are necessary for better prognosis. This report highlights an aggressive and fatal case of mandibular osteosarcoma in a 23-year male patient, which, if diagnosed earlier, would have added some valuable years to the patient's life.