Abbreviations used: ABC = Aneurysmal bone cyst CMF = Chondromyxoid fibroma EG = Eosinophilic Granuloma GCT = Giant cell tumour FD = Fibrous dysplasia HPT = Hyperparathyroidism with Brown tumor NOF = Non Ossifying Fibroma SBC = Simple Bone Cyst Systematic Approach The most important determinators in the analysis of a potential bone tumor are: The morphology of the bone lesion on a plain radiograph Well-defined osteolytic ill-defined osteolytic Sclerotic The age of the patient It is important to realize that the plain radiograph is the most useful examination for differentiating these lesions.