NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,913 terms related to cancer and medicine.

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Helicobacter pylori
(HEEL-ih-koh-BAK-ter py-LOR-ee)
A type of bacterium that causes inflammation and ulcers in the stomach or small intestine. People with Helicobacter pylori infections may be more likely to develop cancer in the stomach, including MALT (mucosa-associated lymphoid tissue) lymphoma. Also called H. pylori.