so for the past year i have been having some burning and pain just inside the anal area maybe a finger tip in. Its been getting a little more frequent in the past month. Dr. Shen sent me for an MRI just to rule out an abcess or fistula. MRI came back and stated no pouchitis, no abcess, no fistula, no fluid collections etc...but stated "small amount of presacral edema superimposed on an area of previously present presacral thickening, slightly increased from the prior study 2 years ago." .. any idea what this is and should i be concerned? I cant seem to get an answer from Shens office as he is getting ready to leave for NYC and the office is in shambles and scrambling.