A 6-year-old boy complains of a 4-day history of low back pa…
A 6-year-old boy complains of a 4-day history of low back pain and difficulty walking. On examination, you note weakness in his lower extremities and absent lower extremity deep tendon reflexes. Sensation in the lower extremities is intact. A magnetic resonance imaging scan of the spine is normal. Which of the following is the most likely diagnosis?
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