A 27-year-old man presented to our hospital's emergency department (ED) with an abnormal gait, paresthesias of the lower extremities, and lower back pain that had progressed over 2 weeks. He… Click to show full abstract
A 27-year-old man presented to our hospital's emergency department (ED) with an abnormal gait, paresthesias of the lower extremities, and lower back pain that had progressed over 2 weeks. He reported no medical history and a family history notable only for poor folic acid absorption in his father (etiology unknown).
               
Click one of the above tabs to view related content.