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Bodies pancreatitis malabsorption inflammatory bowel diseases (ibd) clostridium difficile-induced colitis diverticular disease irritable bowel syndrome (ibs) anal and rectal disorders tumors of the digestive system gastrointestinal emergencies topics in tumors of the digestive system esophageal tumors that are noncancerous esophageal cancer stomach tumors that are noncancerous stomach cancer small-intestine tumors that are noncancerous small-intestine cancer colorectal polyps colorectal cancer anal cancer pancreatic cancer pancreatic endocrine tumors   merck manual > patients & caregivers > digestive disorders > tumors of the digestive system 4   stomach cancer share this a helicobacter pylori infection seems to be the cause of most stomach cancer. Vague abdominal discomfort, weight loss, and weakness are some typical symptoms. The best diagnostic procedure is an endoscopy. The survival rate is low because the cancer tends to spread early to other sites. cheap viagra cheap viagra on line overnight cheap viagra online viagra for sale buy generic viagra viagra for sale Surgery is performed to eliminate the cancer or relieve symptoms. About 95% of stomach cancers are adenocarcinomas. Adenocarcinomas of the stomach originate from the glandular cells of the stomach lining. In the united states, adenocarcinoma of the stomach occurs in about 21,000 people each year and is the seventh most common cause of cancer death. It is more common among certain populations: people aged 50 and older, poor people, blacks, hispanics, american indians, and people who live in northern climates. For unknown reasons, adenocarcinoma of the stomach is becoming less common in the united states. It is far more common in japan, china, chile, and iceland. In these nations, screening programs are an important means of early detection. Causes and risk factors adenocarcinoma of the stomach often begins at a site where the stomach lining is inflamed. Many experts now believe that an infection with the bacterium helicobacter pylori is the cause of most stomach cancer. Stomach polyps may become cancerous (malignant) and are thus removed. Adenocarcinoma of the stomach is particularly likely to develop if the polyps consist of glandular cells, if the polyps are larger than ¾ inch (2 centimeters), or if several polyps exist. Certain dietary factors were once thought to play a role in the development of adenocarcinoma of the stomach. These factors included a high intake of salt, a high intake of carbohydrates, a high intake of preservatives called nitrates (often present in sm.