A blind ending sinus tract of 25mm was discovered on my mri scans a few years ago. I had no knowledge of any symptoms although I have had numerous issues with that part of my anatomy. The CRS treating me at the time really didn’t seem too bothered about the finding as it was noted by the radiographers that there was no evidence of any anal fistula. Occasionally I feel sharp pains in that area but have never had it confirmed that it is from the tract itself.
Anybody had one of these and had no problems with it?