 - A single non-curable factor was defined as hepatic metastasis H1; two to four lesions of maximum diameter 5 cm and minimum diameter 1 cm; peritoneal metastasis P1 in the diaphragm or peritoneum caudal to the transverse colon without massive ascites or intestinal obstruction; positive cytology CY1 when the cancer cells were found in the peritoneal washing; para-aortic lymph node PAN metastasis above the coeliac axis or below the inferior mesenteric artery lymph node 16a1b2 of maximum diameter 1 cm, or both; or ovary implant metastasis for one site or two. 