alexa The possible involvement of micro-organisms other than Helicobacter pylori in the development of rectal MALT lymphoma in H. pylori-negative patients
Gastroenterology

Gastroenterology

Journal of Gastrointestinal Cancer and Stromal Tumors

Author(s): Nakase H, Okazaki K, Ohana M, Ikeda K, Uchida K, Uose S, Itoh T, Iwano M, Watanabe N, Yazumi S, Chiba T

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It remains unclear whether lymphoma of the mucosa-associated lymphoid tissue (MALT) in the extragastric organs is related to Helicobacter pylori infection or not. This report describes three patients with rectal MALT lymphoma negative for H. pylori infection, all of whom showed disease regression after being treated with antibiotics. One patient had MALT lymphoma in both the descending colon and the rectum; the other two patients had rectal disease only. None of the patients had chronic gastritis which was detectable either endoscopically or histologically and H. pylori infection was completely ruled out by various methods, including a urease breath test. These patients received antibiotic therapy. In all the patients, regression of MALT lymphoma was observed endoscopically and histologically, and polymerase chain reaction revealed that a previously observed rearranged band of immunoglobulin heavy chain had also disappeared after antibiotic treatment. These cases therefore suggest involvement of micro-organisms other than H. pylori in the development of rectal MALT lymphoma.

This article was published in Endoscopy and referenced in Journal of Gastrointestinal Cancer and Stromal Tumors

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