hi dear madam. the colectomy is now a days a relatively easy surgery. you should ask.... how much colon he is going to save. the chances of polyps in the saved part of colon. possibility of laparoscopic colectomy, as it has less post operative pain. colon evacuation preparation before surgery. antibiotics before surgery. apart from the surgical and anaesthetic complications, after this surgery you will have diarrhea, for that you can take medicines.