I am new to this Forum. Had a rectal polyp removed which had cancer in it. It came out cleanly and scans showed no sign of spread. However there was evidence of lymphatic invasion. Surgeon calculated risk of lymph node deposits at 20% versus 80% chance I am clear. He advises abdominoperineal resection and permanent colostomy, but says I could opt for active surveillance. What do I do ? Going potty trying to decide. Wouls a second opinion help?