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Helicobacter pylori has been classified as a group 1 carcinogen for gastric cancer. It is estimated that there is between a two- and sixfold increase in the risk of developing gastric cancer among infected patients. Among different populations, the risk of H. pylori-infected individuals developing gastric cancer varies greatly. However, on a worldwide scale, gastric cancer is the second most common cause of cancer-related death. Therefore, H. pylori eradication could help prevent up to three to four million gastric cancer deaths per year. H. pylori is usually acquired in childhood. Because infected children have not harboured the organism for long enough to have developed precancerous lesions, childhood is theoretically an attractive time for H. pylori eradication and, thus, could help prevent gastric cancer later in life. However, as H. pylori prevalence and the incidence of gastric cancer are falling rapidly in developed nations, widespread population screening programs aimed at the eradication of H. pylori in these countries would be enormously expensive. Therefore, except in groups with a high risk for development of gastric cancer (eg, Japanese or those with a strong positive family history of gastric cancer), a population-based test-and-treat policy is not justified.

Will Treatment of Helicobacter Pylori Infection in Childhood Alter the Risk of Developing Gastric Cancer?