Objectives: Aneurysmal bone cysts (ABC) are benign bone tumors which are highly vascularized. The main course of treatment is curettage followed by bone grafting or cement insertion. Still recurrence remains a main problem for patients. Denosumab is a monoclonal antibody which acts as an inhibitor of[for full text, please go to the a.m. URL] Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2017)