Liver, peritoneal or other metastasis | Continuous invasion of duodenum, stomach or colon |
Uncertain whether distant lymph node metastasis influence prognosis | Lymph node metastasis within the operative field |
Major venous encasement: >2 cm in length, >50% circumference involvement | Para-aortic lymph node involvement |
Superior mesenteric, coeliac or hepatic artery encasement | Venous impingement or minimal invasion of superior mesenteric and hepatic portal veins |
Severe comorbid illness | Gastroduodenal artery encasement |
Cirrhosis with portal hypertension | Age of patient |