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': "Onion peel appearance on radiograph is not seen in \nSelect and explain. \nA. Garre's osteomyelitis, B. Ewing's sarcoma, C. Osteogenic sarcoma, D. Fibrous dysplasia", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Fibrous dysplasia-\xa0\nThe normal radiolucent maxillary sinus may be\xa0partially or totally replaced by the increased radiopacity of\xa0 this lesion. The degree of radiopacity depends on its stage of development and the relative amounts of bone and fibrous tissue present. Usually the radiopaque areas have a uniform characteristic ground-glass appearance on extraoral images or an orange-peel appearance\xa0on intraoral views. Onion-peel appearance is not seen in this condition.\nWhite and Pharoah, 7th ed, pg- 485', 'role': 'assistant'}]