Stomach cancer is referred to as gastric cancer. The most common type of gastric cancer is called adenocarcinoma. This starts in the glandular tissue that composes the lining of the stomach and accounts for 90% to 95% of all gastric cancers. Other forms of gastric cancer include lymphomas, which involve the lymphatic system and sarcomas, which involve the connective tissue (such as muscle, fat, or blood vessels).

Generally, the best chance for cure of gastric cancer is when it is…