dave if the dr. didn't get all the polyp the cancer will grow ...either cause restriction , possible rupture..or metastatize to more cancer...in other areas of the body...colon resection would be my choice{I'm a surgical tech}. My advice is to ask about the possibility of having it done laparoscopic..they'll may tatoo the site of the cancer during another colonoscopy,probably the schedule the surgery for a few days later...I'm not sure about other treatment like chemo but I wouldn't take the chance
You should have a resection either laparoscopy or open. This is standard of care.