I have had, and been treated for, both prostate and colorectal cancer. My PSA remains low, but the colon cancer recurred after the first surgery, and the second surgery went very badly. I had to have a colostomy, was in surgery 10 hours, and lost 9 pints of blood. Both surgeries showed that the tumors didn't escape the muscularis propia, and the local lymph nodes were not affected. 9 months later 2 nodules were found in my lungs, 2mm and 3mm. 3 months later the smaller one seems to be gone, and the 3mm one is unchanged. Any idea what the odds are that the one left is benign?