Gastrointestinal Cancers are which the tumor affect the digestive system. These include anal cancer where the tumor is caused in the anal and it is very different form colorectal cancer. Stomach cancer which is also known as gastric cancer where the tumor is affected in the inner layer of the stomach. Pancreatic cancer starts in pancreas an organ behind the stomach and the most are exocrine tumors. Liver cancer also known as hepatic cancer. This is the condition where the normal cells in the liver become abnormal in appearance and behavior. Cancers which start in esophagus are much more common in men than in women.