Depends when they catch it. If it is Stage IV, it is very bad. He has less than a 10% chance of surviving another 5 years with zero chance of cure. Treatment is 100% palliative in this stage. If caught early though, he has a very good prognosis for full recovery assuming he is healthy.
colon cancer has several risk factors like age- risk of this cancer increase with age.polyps- polyps are risk factors of this cancer but u can remove this by doing colonoscopy.history of cancer- if anyone in family has cancer, low level of selenium, smoking and virus