MY SON, 17, HAD A CHIARI DECOMPRESSION IN 2011. NO

MY SON, 17, HAD A CHIARI DECOMPRESSION IN 2011. NO SYMPTOMS SINCE SURGERY.
FOR PAST 3 MO HIS RIGHT LEG NUMB ALL THE WAY TO HIS ANKLE, EXTREME LOWER BACK PAIN, HAND TREMORS, AND EXTREME TEMPLE PAIN WHEN HE LOOKS DOWN (CHIN TO CHEST). HAS BEEN SEEN BY ORTHO, BACK TO HIS NEUROSURGEON, HAD FULL MRI LAST NIGHT (BRAIN, CERVICAL, AND LUMBAR). CHAIRI IS STABLE, NO CSF LEAK, SYRNIX IS STABLE.....
THEY DONT KNOW WHAT ELSE TO DO......