CASE 47 History: A 26-year-old man presents with a 7-month history of left-sided lower back pain. 1. What should be included in the differential diagnosis? (Choose all that apply.) b. Lymphoma e. Osteosarcoma 2. What is the distribution of occurrence along the spinal axis? 3. Which of the following statements regarding osteoblastoma and osteoid osteoma is true? a. Reactive bone changes are more common in osteoblastoma than in osteoid osteoma. c. The nidus of an osteoblastoma is smaller than the nidus of an osteoid osteoma. 4. Which finding is used to differentiate osteoid osteoma from osteoblastoma?
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