Differential diagnosis of a lesion, histologically resembling giant cell tumour in the small bones of the hand/feet, include all of the following except: March 2005

Ans. A: Fibrosarcoma Lytic bony lesions: Differential Diagnosis (Mnemonic = FOGMACHINES): F = Fibrous Dysplasia 0 = Osteoblastoma G = Giant Cell Tumour M = Metastasis / Mveloma A = Aneurysmal Bone Cyst C = Chondroblastoma H = Hyperparathyroidism (brown tumours)/ Hemangioma I = Infection N = Non-ossifying Fibroma E = Eosinophilic Granuloma/ Enchondroma S = Solitary Bone Cyst