One of the surgeons told me tonight: "What I cannot see does not exist. So forget about genetics!"
Well, I'm not so sure -- consider this link:
Colorectal Cancer Gene Mutation Found. Odds of Developing Colorectal Cancer May Be 9 Times Higher for Mutation Carriers. WebMD.
"The mutation, which lies in a gene called TGFBR1, was found in about 10% to 20% of the 242 colorectal cancer patients the researchers studied, compared to 3% of 195 adults without colorectal cancer.
The researchers aren't recommending TGFBR1 gene tests just yet. But such tests "may become part of clinical practice when evaluating a patient's colon cancer risk."
There is a relationship between genetics and surgery after all.
Disclaimer: The author greatly respects surgery and surgeons.
Image source: Stomach diagram, Wikipedia.