[Fibroblastic osteosarcoma in mandible: a rare case report and review of literature]

Osteosarcoma is a malignancy of mesenchymal cells that have the ability to produce Osteoid or immature bone. Osteosarcoma of the jaw is uncommon and represents 6-8% of all osteosarcomas. This tumor occurs most often in the third and fourth decades of life, which is 10-15 years older than the mean age for Osteosarcomas of the long bones. The Maxilla and Mandible are involved with a boot equal frequency and a slight male predominance, is noted. Mandibular tumors arise more frequently in the posterior body and horizontal ramus. Maxillary lesions are discovered more commonly in the alveolar ridge, sinus floor and palate. This article is a report of fibroblastic Osteosarcoma in the mandible of a 35 years old man that has been referred to pathology Department of Shahid Beheshti dental school. The specific characteristic of this case, is its histologic features, because fibioblastic Osteosarcoma is rare in jaws and most cases are chondroblastic Osteosarcoma