Thought I would provide an update on the process I went though and my current condition to add to the collective experience for anyone facing this in the future (and thanks to those who provided their experience in my original post). As a preamble, I note that I live in Calgary, Alberta, Canada - I’m pretty sure there are some that post here that live in the area so they can read this in that context.
Surgery was 22 January (Thursday) to remove ascending portion of colon (right side). The reason of doing so was that a colonoscopy a couple of months earlier revealed a “villous mass” which I understand is a potential precursor to cancer, so the affected section of colon is removed as a preventative measure. Laparoscopic so no major incisions. Only complication was that they couldn’t immediately find the appendix to remove (apparently normally done as part of the procedure) - apparently it was a little higher in the torso than expected. I just tell my nephew that I am a mutant X-man now 
Immediately upon achieving some level of consciousness, I checked for a bag - nothing. Back to sleep. They later moved me to a private room without asking - score! I would have asked if I hadn’t got one, but then I would have had to pay for it (albeit with some insurance coverage).
Most of the pain over the next several days was along the centre line of the abdomen, as if I’d done far to many crunches. This gradually subsided over the course of a week and a half. Took myself off painkillers on Tuesday after surgery when the discomfort on waking (without a pill) was less than the discomfort the night before (with a pill). I am an Ironman after all, if only the one time.
The hospital used a new protocol which is apparently gaining popularity, the use of high protein and solid food to enhance recovery. I ate half a sandwich and pudding for supper a few hours after surgery - no liquid diet, and solid food for as long as I stayed in hospital. As endurance athletes, we would recognize this as being obvious, since that is what we do ourselves. Never would have thought to apply it to surgery though, especially involving the digestive system.
Multiple rounds of bloody diarrhea on the Saturday after surgery. This was apparently good enough to show that the digestive system was working well enough, and I was offered the door. I decided to stay on for another day in the mistaken belief that I needed a solid bowel movement before I could leave. I ended up leaving on the Sunday, three days after surgery, and didn’t get a solid movement until Wednesday. Since then, I have recovered very well with daily bowel movements and was back to work full time two and a half weeks after surgery. Just didn’t wear a belt for the first week.
Jumped on the bike trainer for 10 minutes a couple of weeks after surgery to see how it felt - still a little uncomfortable, so I let it go for another couple of weeks until I saw the surgeon again. Did a lot of half hour walks instead. After seeing the surgeon, I started swimming, biking and running again. All very light workouts, and it will probably stay that way for the next few months because…
Turns out that when the biopsy was performed on the removed tissue, a cancer tumour was found. Based on the size, I’m guessing it was too small to be detectable when the original colonoscopy was performed. I also had not displayed any of the symptoms that are associated with the type of tumour. So, I am very lucky to have had it removed already, even if only by pure dumb luck. Still have to have a CT scan done to properly stage the tumour, but I had my first round of chemotherapy yesterday, which is a good news/bad news situation. Good news is that I moved to near the top of the list for chemotherapy, based upon the type of tumour (rare and aggressive). Bad news is that they moved me to near the top of the list based upon the type of tumour. Still, I’m hopeful that this got caught early enough that I will get through this OK - early 50s and fairly fit. Does make filling out insurance forms awkward though since they assume that there were symptoms and diagnosis rather than a chance discovery.
So, Chicago, and any sort of real competition, is definitely out for this year
The new Trek will have to remain under the dust cover for another few months.