Case History A 40 years old female patient presented to us with 3 months history of progressively increasing weakness in both legs. Patient is not able to walk independently. Two relatives were supporting her to walk. Patient also gave us history of a spine surgery done in. upper back (thoracic spine) 2 years ago. Details of that surgery were not available, however, it seemed a spinal decompression procedure was done. According to the patient, that...