Both of my parents died of colon cancer. My father first. By the time they felt the symptoms, it was already too late. When they operated on him, the cancer had already spread to other organs. I think he lived for another 8 months. After watching my father go thru that, did my mother take any precautions? Nope. Never said anything until she started having symptoms. Operation had the same results as my fathers. Tho they passed 3 years apart they were both 74 when they passed. I’m 72 and my last colonoscopy showed me to be healthy. My diet is different than theirs. A colonoscopy procedure isn’t a lot of fun, but if one isn’t proactive about their health (my parents were not) they may pay the ultimate price. It sounds like what you are going thru is different and far more unpleasant than what my parents went thru. May you come out healthy and back to work. 50 is far to young to be going thru this. Did your doctors indicate if anything about your diet contributed to this?