I had a positive fecal occult blood test, and the extreme scraped flat appearance of the stools, constriction etc made for a consistent diagnosis. However I stopped short of having an official diagnosis for a few reasons.
1) I was purchasing a business with a bank loan. So having a cancer diagnosis would have killed the bank loan and also made getting life insurance (also a condition for the loan) impossible.
2) Once the official diagnosis is made, there would be tons of family attention and well meaning arm twisting to force me into conventional treatment. The constant hysteria, guilting and panic would be non-stop until I relented.
3) It occurred to me that given the substantial case for colorectal cancer with the occult test and flat stools, that even if there was a possibility it somehow wasn't actually cancer that I'd never know it anyway. The huge profits would compel them to run me through the $300K gauntlet of cancer treatments anyway.
Cynical, but true nonetheless.
I had enough faith in natural cures and enough certainty in the harmfulness and lack of cure in convention medicine to drop out of the process while I still had a choice.
When to opt out is a critical decision we must all make when we decide to go with natural healing. If you believe like I do that conventional medicine does nothing but harm (for most diseases and especially cancer) than there isn't much risk involved anyway.
If you do Budwig, go to a purer diet, take more sunlight and exercise all you'll do is improve your health in all aspects anyway - even if you're wrong about having cancer.
For me I reached the point of almost total impaction where I'd have to go for surgery anyway in a matter of weeks if Budwig didn't start reversing the tumor size.