<prompt> A patient presents with pain in the thigh, relieved by aspirin. X-ray shows a radiolucent mass surrounded by sclerosis. Diagnosis is ?OsteomaOsteoid osteomaOsteoblastomaOsteoclastoma  <response>: Ans. is b i.e., Osteoid osteoma Radiolucent lesion with surrounded sclerosis and pain relief by a salicylate aspirin are characteristics of osteoid osteoma. 