ABSTRACT
15 cases of Aneurysmal Bone Cysts [ABCs] were treated in Mansoura University Hospital [Oncology unit] and Sohag University Hospital from 1996 to 1999 with subtotal resection and transplant fibular and iliac graft from the mother. All cases were type II according to Capanna's classification. There were 9 boys and 6 girls. The site of the lesion was in mletadiaphysis area. The distribution of the lesion were 6 cases in the upper third of the tibia, 5 cases in the upper third of the humerus and 4 cases in the upper third of the femur. All cases immobilized in the plaster cast for 3 months. The follow up period ranged from 6 month to 3 years [average 2 years]. The results were evaluated clinically, radiologically and functionally. There was no recurrence and complete healing in 87% of cases and 13% of cases has incomplete healing but there is no recurrence. The overall end results were excellent in 80% of cases, 13% of cases has good result and 7% of cases has fair result. Subtotal resection and allograft from the mother is a good alternative in the treatment of the huge aggressive ABCs in which the subtotal resection prevent the recurrence and allograft from the mother to fill the defect in the child