A 3-Year-Old Girl With Fever and a Limp A 3-year-old girl is brought to the ED by her parents with a fever and refusal to walk secondary to pain in her right leg and back. The mother denies any history of trauma to the affected extremity. There is localized exquisite tenderness over the L1-2 region of the back, with slight induration noted in the overlying tissue. Plain radiographic films and MRI scans of the spine are obtained. What diagnosis do the findings on the MRI scan suggest?