الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
Bone tumours are relatively uncommon. Malignant bone tumours constitute about 3.59% of all malignant tumours in our locality. Of all primary malignant bone tumours, osteosarcoma is the commonest (33%) . This is followed by giant cell tumour (19%) ,chondrosarcoma (11.5%) and Ewing’s sarcoma (8%). Metastatic and marrow tumours are relatively infrequent in our series. As, they form about 17% and 80/0 of malignant bone tumours respectively. Benign bone tumours constitutes 32% of our cases. The most frequent was osteochondroma (43%) followed by enchondroma (14%) then osteoma (12%) Regarding the age incidence of bone tumours, it was found that osteosarcoma and Ewing’s sarcoma commonly affect young patients during their first two decades of life. On contrary, myeloma tends to affects an older age group of patients. Chondrosarcoma can affects any age group with a relatively higher frequency in old age. Benign bone tumours tend to affect young age in our series. No sex predilection was noticed in malignant bone tumours, however benign tumours show male sex predominance. The mot common tumour like lesions are fibrous dysplasis (44.8%) and aneurysmal bone cyst(33% tumour like lesions). Most of the tumour like lesions affect young age group with near equal sex distribution