This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'Which sarcoma does\xa0not display the radiographic feature of Codman’s triangle? \nSelect and explain. \nA. Fibrosarcoma, B. Osteosarcoma, C. Ewing’s sarcoma, D. Chondrosarcoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Chondrosarcomas are slow-growing tumors,\xa0and their radiologic signs may be misleading and benign in nature. The lesions are generally round, ovoid, or lobulated. Their borders are generally well defined and at times corticated; at other times melding with adjacent normal bone occurs. Occasionally, peripheral periosteal new bone may be present perpendicular to the original cortex,\xa0 giving the so-called sunray or hair-on-end appearance. Uncommonly, these lesions are ill defined and invasive. Aggressive lesions such as these have infiltrative, ill-defined, and noncorticated borders.\nOral radiology White and Pharaoh; 7th ed. Page no 441,442', 'role': 'assistant'}]