FIT Cologuard test every year past 40. They occur at regions of fecal stasis- recto sigmoid and cecum. Sigmoid and colon metastasis go to liver very quickly. Rectal cancer go to the lungs. The cure is dismal, once it has spread out regionally and hematological until recently. A good cocktail of chemotherapy for 12 cycles at 2 weeks interval for Sigmoid and colon metastasis and radiation therapy to the rectum for rectal CA, often times supporting and in conjunction with surgery (colon and liver surgeons] It is as deadly as the - . Thanks for bringing up the issue during avoidable and un avoidable crises inflicting Myanmar.