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: Orthopaedics
[{'content': 'True statements(s) regarding osteoid osteoma is/are -a) Malignantb) MC bone involvement-tibiac) Local excision or curettage cured) Bone pain relieved by aspirine) X-ray shows : density surrounding radiolucent lesion \nSelect and explain. \nA. bde, B. ade, C. ace, D. bce', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Osteoid osteoma is a benign tumor.\nMost common site involved is diaphysis of Tibia.\nPain of osteoid osteoma is relieved by salycylates or other NSAIDs.\nX-ray shows small radiolucent area (nidus) surrounded by dens sclerosis.\nThe only treatment is wide en block excision along with internal fixation with or without bone grafting.', 'role': 'assistant'}]