ABSTRACT
Immediate diagnosis and treatment is very important in fibrooseous lesion and bone tumor because of complication of these lesions like deformity, paresthesia, dysphagia and death. There was no research project of this matter in Iran. So, it was decided to evaluate the prevalence of fibro-osseous and tumoral lesions of head and neck in Shaheed Beheshti Dental School and Taleghani Hospital. This descriptive study was done on the existing data of the 4953 patients referred to the Pathology Department of Shaheed Beheshti Dental School and Taleghani Hospital during 1981-2002. 144 cases of fibro-osseous lesions and bone tumors were collected in this research. Among fibro osseous lesions, fibrous dysplasia was the most prevalent lesion, while among benign bone lesions, osteoma and osteoblastoma and among malignant bony lesions, osteosarcoma had the highest prevalence. Fibrous dysplasia was the most prevalent lesion in females, the second decade of life and in upper jaw. Osteoblastomas were observed in females, in the first and fourth decades of life and in lower jaw. Osteoma was seen mostly in females, in the third decade of life and in lower jaw, while osteosarcoma was prevalent in males, in the third decade of life and in lower jaw