I have had 3 lipoma removal surgeries within the past 2-3 years, in exactly the same location. The first two were 6 inches long and the third was 4. I had a disc fusion surgery about 4 years ago on my L5S1 and this is the same area where the lipomas are growing. I do not know if that has anything to do with it and the doctors can't give me any answers as to why they keep coming back.