Syrinx Symptoms?

Hi all just wondering if anyone can answer some questions for me…I was decompressed in July 2010 and it has definitely helped my headaches hardly have any now…But the last few months I am struggling with bad nausea…upper back pain…pain and weakness in my legs, chest pain, swallowing problems and bad balance issues…I know I have a syrinx from the chiari (don’t know the size)but I’ve always been told that it wouldn’t cause problems…I saw a different professor last week and he asked me if I have any back problems as this can cause my problems as all other tests I’ve had done have been clear…I’m going for an mri on Tuesday and to see my surgeon…So just wondering if anyone knows can these symptoms be related to a syrinx so I can push him on it…Thanks as always…Lin…xxxx