Adenocarcinoma of the appendix

My partner heard from his McMillan nurse after the mdt meeting.  They found cancer in his appendix that was removed in August. He's to have surgery to remove part of the right side of his colon. He didn't ask the questions I would have asked. Firstly I'd like to know will they take away the entire right side of his colon, will he need a stoma how long is he likely to be in hospital.