Tailbone removal AFTER Brain Surgery?

I have been having trouble with my tailbone BEFORE by brain decompression surgery April 2013 for Chiari...and CONTINUE to have pain even AFTER...My Dr. is not satisfied with MRI and is ordering a CT scan with contrast to the tailbone area...he fears that I may have a tumor or a very flexible bone...

As anyone else had this experience?? I have heard of tethered cord being related to Chiari BUT Dr. assured me that this is NOT what it is...will know later after the CT scan sometime this week :(

when I typed it in the only post that showed was yours :(

Thanks YOU :)