I first felt a lump at the bottom of my spine Feb 2004. After 1st MRI I was told it's a cyst hanging from my sacrum and also another inside, one 6 and one 4 cm in diam. Had 2nd MRI in December (still awaiting result). Was told it could cause more problems having them removed. I would like to know if it is possible to have them removed (maybe laser) and what are the risks?