Osteoid osteomas are benign bone-forming tumours that typically occur in children (particularly adolescents). They have characteristic lucent nidus <2 cm and surrounding solid periosteal reaction and classically cause night pain that is relieved by the use of salicylate analgesia, e.g. aspirin. #osteoid #osteoma #tumor #children #peds #pediatrics #nidus #radiology #ortho
