I did hear once of a women who was diagnosed with state 4 colon cancer that did not have the cancer inside her colon per say, but rather orginated in one of the many folds/turns in her colon. I'm not sure how reliable this story was, but anyway, a normal colonoscopy was unable to pick up the cancer, because it was not inside the colon. It was only thru surgery, and a biospy, that they were able to determine the cancer.
Again I repeat, I read about this story on some chat line many yrs ago, and am not sure how reliable it is.
rectal cancer - April 2004
46 yrs old at diagnoses
stage III C - 6/13 lymph positive
radiation - 6 weeks
surgery - August 2004
chemo - FOLFOX
NED - 9 years and counting!