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Alternative Names Return to top
Cancer - stomach; Stomach cancer; Gastric carcinomaDefinition Return to top
Gastric cancers are malignancies of the stomach.
Causes Return to top
Several different types of cancer can occur in the stomach. The most common type is called adenocarcinoma, which refers to the way the cancer looks under the microscope. There are several types of adenocarcinoma. Because other types of gastric cancer occur much less frequently, this article focuses on adenocarcinoma.
Adenocarcinoma of the stomach is a common cancer of the digestive tract worldwide, although it is relatively uncommon in the US. It occurs most frequently in men over 40 years old. The incidence of this form of gastric cancer is extremely high in Japan, Chile, and Iceland. The incidence of most types of gastric adenocarcinoma in the US has declined over the years. Experts think the decrease may be related to reduced intake of salted, cured, and smoked foods.
However, the incidence of adenocarcinoma in the high part of the stomach where it connects with the esophagus has increased markedly, along with an increase in cancers of the lower esophagus. The reason for this increase is unknown.
Diagnosis is often delayed by the absence of symptoms in early disease or by self-treatment of symptoms that may be common to other, less serious gastrointestinal disorders (bloating, gas, and a sense of fullness).
Risk factors for gastric cancer are a family history of gastric cancer, Helicobacter pylori infection, blood type A, a history of pernicious anemia, a history of chronic atrophic gastritis, a condition of decreased gastric acid, and a prior history of adenomatous gastric polyp.
Symptoms Return to top
Exams and Tests Return to top
Treatment Return to top
Surgical removal of the stomach (gastrectomy) is the only curative treatment. Radiation therapy and chemotherapy may be beneficial. A recent study showed that for many patients, chemotherapy and radiation therapy given after surgery improve the chance of a cure.
For patients in whom surgery is not an option, chemotherapy or radiation can improve symptoms. For some patients, a surgical bypass procedure may provide relief of symptoms.
Support Groups Return to top
The stress of illness may often be eased by joining a support group with members who share common experiences and problems. See cancer - support group and gastrointestinal disorders - support group.
Outlook (Prognosis) Return to top
There is a wide variation in prognosis of gastric tumors. Tumors in the lower stomach are more often cured than those in the higher area -- gastric cardia or gastroesophageal junction. The depth to which the tumor invades the stomach wall and whether lymph nodes are involved influence the chances of cure.
In circumstances in which the tumor has spread outside of the stomach, cure is not possible and treatment is directed toward improvement of symptoms.
Possible Complications Return to top
When to Contact a Medical Professional Return to top
Call your health care provider if symptoms of gastric cancer develop.
Prevention Return to top
In Japan, where the risk of gastric cancer is very high, mass screening programs have been successful in detecting disease in the early stages. The value of screening in the United States and other countries with lower rates of gastric cancer is not clear. Avoiding smoking may reduce risk.
Update Date: 4/7/2008 Updated by: A.D.A.M. Editorial Team: David Zieve, MD, MHA, Greg Juhn, MTPW, David R. Eltz, Kelli A. Stacy, ELS. Previously reviewed by Rita Nanda, MD, Department of Medicine, Section of Hematology/Oncology, University of Chicago Medical Center, Chicago, IL. Review provided by VeriMed Healthcare Network (9/11/2006).
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