Comparison between Benign and Malignant Primary Bone Tumors-A Histopathological Study of 119 Cases

This is a prospective study done at Al wasity teaching hospital for reconstructive surgeries in Bagdad in a period from November 2014 to April 2017, using a Total of 119 samples of primary bone tumors which were diagnosed both histopathologically and radiologically. The main objectives of this study was to make a comparison between benign and malignant bone tumors. Immunohistochemical staining was done to confirm the diagnosis of primary malignant bone tumors and the proliferative index of them were carefully evaluated. Out of 119 samples of primary bone tumors used in this study ,100 (84%) were benign and borderline(osteoclastoma) and 19(16%) were malignant, the mean age for benign tumors was lower than the mean age for primary malignant one and both frequently present in the 2nd decade of life, male to female ratio for benign bone tumors was 3\2 and 8.5\1 for primary malignant one, femure was the most common location for benign bone tumors while tibia was the most common bone affected by primary malignant bone tumors. the study also showed that the most common benign bone tumors were osteochondromas(67%) and most common primary malignant bone tumors were osteosarcomas(52.63%),thus this study rise a conclusion that in general, primary bone tumors were mainly benign, occurred predominantly in the second decade of life with a male preponderance