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Low back pain (LBP) is common in children and adolescents. There are many factors that cause LBP, including structural disorders, degenerative changes, Scheuermann's disease, fractures, inflammation, and tumors. Magnetic Resonance Imaging is the gold standard for diagnosing spinal abnormalities and is mandatory when neurological symptoms exist. The study focuses on common MRI findings in adolescents with persistent LBP, without history of acute trauma or evidence of either inflammatory or rheumatic disease.Materials and Methods   Eleven adolescents were submitted to thoracic and/or lumbar spine MRI due to persistent LBP. The protocol consisted of T1 WI, T2 WI, and T2 WI with FS, in the axial, sagittal, and coronal plane.Results   MRI revealed structural abnormalities (scoliosis and kyphosis) in 4/11 (36.36%); disc abnormalities and endplate changes were found on 11/11 (100%). Typical Scheuermann's disease was found in 3/11 (27.27%). Endplate changes were severe in Scheuermann's patients and mild to moderate in the remaining 8/11 (72.72%). Kyphosis was in all cases secondary to Scheuermann's disease. Disk bulges and hernias were found in 8/11 (72.72%), all located in the lumbar spine.Conclusion   In adolescents with LBP, structural spinal disorders, degenerative changes, and Scheuermann's disease are commonly found on MRI; however, degenerative changes prevail.

Frequent Benign, Nontraumatic, Noninflammatory Causes of Low Back Pain in Adolescents: MRI Findings