A 77 yrs old with a good performance , adenocarcinoma of rectum 3 cm above dentate line and sessile polyp in ascending and transverse colon witch removed endoscopically with hi grade dysplasia in pathology.CT scan showed no mets in lung ,liver or para aorta. EUS in rectum T3N1.patients received neoadjuvant chemoradiotherapy and re staging CT scan showed any changes.withch surgery do you recommend?