Explanation:Osteoid osteoma is a benign bone tumor characterized by intense nocturnal pain that responds dramatically to NSAIDs. The pain is caused by high prostaglandin production within the nidus. Radiographically, a small radiolucent nidus surrounded by reactive sclerosis is typical. The tumor most commonly affects adolescents and young adults. CT imaging is particularly useful in identifying the nidus. Treatment options include radiofrequency ablation or surgical excision. Reference: Jaffe HL. "Osteoid Osteoma." Bulletin of the Hospital for Joint Diseases, 1935.