Stomach cancer, also known as gastric cancer, is cancer that starts in any part of the stomach. The stomach is just one of many organs located in the abdomen, the area of the body between the chest and the pelvis. Among other organs found in the abdomen are the liver, pancreas, gallbladder, and colon. It is important to differentiate among these organs, because cancers and other diseases that affect them present different symptoms and are treated differently. Though, the exact causes of stomach cancer is not known, but there are surely many risk factors believed to contribute to cells in the stomach becoming cancerous.
Several different types of cancer can occur in the stomach. They are adenocarcinoma, lymphoma, carcinoid cancer, and gastrointestinal stromal tumor (GIST). The most common type is called adenocarcinoma, which starts from one of the common cell types found in the lining of the stomach.
Stomach cancer is uncommon in the United States, and the number of people diagnosed with the disease each year is declining. Stomach cancer is much more common in other areas of the world, particularly Japan.
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