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General Information About Gastric Cancer
Related Summaries
Statistics
Epidemiology
Risk Factors
Prognosis
Related Summaries
Other PDQ summaries containing information related to gastric cancer include:
Statistics
Estimated new cases and deaths from gastric cancer in the United States in 2008:[1]
- New cases: 21,500.
- Deaths: 10,880.
Epidemiology
Management of adenocarcinoma histology, which accounts for 90% to 95% of all gastric malignancies,
is discussed in this summary. The site
of cancer origin within the stomach has changed in frequency in the United
States over recent decades.[2] Cancer of the distal half of the stomach has
been decreasing in the United States since the 1930s. However, in the last 2
decades, the incidence of cancer of the cardia and gastroesophageal junction
has been rapidly rising. The incidence of this cancer has increased
dramatically, especially in patients younger than 40 years.
Risk Factors
In the United States, gastric cancer ranks 14th in incidence among the major
types of cancer malignancies. While the precise etiology is unknown,
acknowledged risk factors for gastric cancer include:[3-5]
-
Helicobacter pylori
gastric infection.
- Advanced age.
- Male gender.
- Diet low in fruits and vegetables.
- Diet high in salted, smoked, or preserved foods.
- Chronic atrophic gastritis.
- Intestinal metaplasia.
- Pernicious anemia.
- Gastric adenomatous polyps.
- Family history of gastric cancer.
- Cigarette smoking.
- Menetrier disease (giant hypertrophic gastritis).
- Familial adenomatous polyposis.
Prognosis
The prognosis of patients with gastric cancer is related to tumor extent and
includes both nodal involvement and direct tumor extension beyond the gastric
wall.[6,7] Tumor grade may also provide some prognostic information.[8]
In localized distal gastric cancer, more than 50% of patients can be cured.
However, early-stage disease accounts for only 10% to 20% of all cases
diagnosed in the United States. The remaining patients present with metastatic
disease in either regional or distant sites. The overall survival rate in
these patients at 5 years ranges from almost no survival for patients with
disseminated disease to almost 50% survival for patients with localized distal
gastric cancers confined to resectable regional disease. Even with apparent
localized disease, the 5-year survival rate of patients with proximal gastric
cancer is only 10% to 15%. Although the treatment of patients with
disseminated gastric cancer may result in palliation of symptoms and some
prolongation of survival, long remissions are uncommon.
Gastrointestinal stromal tumors occur most commonly in the stomach. (Refer to
the PDQ summary on Adult Soft Tissue Sarcoma Treatment for more information.)
References
-
American Cancer Society.: Cancer Facts and Figures 2008. Atlanta, Ga: American Cancer Society, 2008. Also available online. Last accessed October 1, 2008.
-
Blot WJ, Devesa SS, Kneller RW, et al.: Rising incidence of adenocarcinoma of the esophagus and gastric cardia. JAMA 265 (10): 1287-9, 1991.
[PUBMED Abstract]
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Kurtz RC, Sherlock P: The diagnosis of gastric cancer. Semin Oncol 12 (1): 11-8, 1985.
[PUBMED Abstract]
-
Scheiman JM, Cutler AF: Helicobacter pylori and gastric cancer. Am J Med 106 (2): 222-6, 1999.
[PUBMED Abstract]
-
Fenoglio-Preiser CM, Noffsinger AE, Belli J, et al.: Pathologic and phenotypic features of gastric cancer. Semin Oncol 23 (3): 292-306, 1996.
[PUBMED Abstract]
-
Siewert JR, Böttcher K, Stein HJ, et al.: Relevant prognostic factors in gastric cancer: ten-year results of the German Gastric Cancer Study. Ann Surg 228 (4): 449-61, 1998.
[PUBMED Abstract]
-
Nakamura K, Ueyama T, Yao T, et al.: Pathology and prognosis of gastric carcinoma. Findings in 10,000 patients who underwent primary gastrectomy. Cancer 70 (5): 1030-7, 1992.
[PUBMED Abstract]
-
Adachi Y, Yasuda K, Inomata M, et al.: Pathology and prognosis of gastric carcinoma: well versus poorly differentiated type. Cancer 89 (7): 1418-24, 2000.
[PUBMED Abstract]
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