<prompt> In rectal carcinoma, distal margin should be at least:2 cm3 cm4 cm5 cm  <response>: Tumor Margin For Curative Excision In GI malignancies stomach, small intestine, colon and proximal rectum, tumor margin for curative excision is 5 cm except: Esophagus: 10 cm Distal rectum: 2 cm 