Re: Lower back pain radiating
I concur with Cheryl that your best bet is calling your spine surgeon. Unless you are in horrendous pain and need an immediate injection, it is doubtful that anyone in the ER would know anything about an arachnoid cyst in your lumbar spine.
I don't see how the surgeon could tell you it is asymptomatic.. "most" arachnoid cysts are asymptomatic, but it sounds like yours are causing you problems. Do you know if they are extradural or intradural?
It sounds like the cyst is not pressing into the spinal canal and causing the symptoms you describe in your legs, etc. Perhaps it was not causing problems previously, but it sounds like it is now...I think another evaluation with your surgeon is in order.
If you should suddenly develop loss of bladder or bowel control, call your doctor or got to the ER right away. The fact that you are having some symptoms at this point is another sign that something is pressing on the central canal...and you need to have this checked out.
Please let us know what you decide to do....and, welcome to the board.