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Twenty cases of Aggressive Simple Bone cysts, 14 located at the proximal end of the humerus and 6 at the proximal end of the femur are reported. Eight cases had revealed signs of recurrence after curettage and remaining 12 were aggressive in their behaviour. All patients were managed by local subperiosteal excision and Dual-Fibular strut grafting between the host bone ends with successful results. The size of the gap ranged between 5-12 cms. The strut grafts taken from one sided fibula were stabilised by kirschner wires in the humerus and by a blade-plate in the femur. All the grafts had united with the host bone within 8-12 weeks and there was no recurrence or any other complication. It is suggested that the cysts with aggressive behaviour or the recurred ones must be excised locally and grafted suitably.