paralysis after lower back surgery

[Melissa]

My 49 year old brother had lower back surgery June 13 for a herniated disc. He was scheduled to have the surgery one day and go home the next. Then we were told the dura membrane was nicked. Otherwise, the doctors said the surgery was very routine and
uneventful. He has been paralyzed since the day of his surgery. He has regained urine and bowel control; he has feeling in his quads. However, no feeling in his buttocks or from the ankles down. What is going on?