This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Giant Cell Tumor (GCT) or Osteoclastoma, Subject name: Orthopaedics
[{'content': 'The differential diagnosis of lesion, histologically resembling giant cell tumour in the small bones of the hands or feet, includes all of the following except: \nSelect and explain. \nA. Aneursymal bone cyst, B. Fibrosarcoma, C. Osteosarcoma, D. Hyperparathyroidism', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Fibrosarcoma Histological differential diagnosis of Giant cell tumorGiant cell reparative granuloma (a benign reactive condition)Brown tumor of hyperparathyroidism Non-ossifying fibroma Benign fibrous histiocytoma Aneurysmal bone cyst Osteosarcoma with prominent giant cells.Metastatic ca with giant cells.", 'role': 'assistant'}]