title: Regression of primary gastric lymphoma of mucosa-associated lymphoid tissue type after cure of Helicobacter pylori infection. MALT Lymphoma Study Group.
abstract: Lymphoma of gastric-mucosa-associated lymphatic tissue (MALT) type has been linked to infection with Helicobacter pylori. We investigated the effect on MALT lymphoma of eradicating H pylori infection. 33 patients with primary gastric low-grade MALT lymphoma associated with H pylori gastritis were treated with omeprazole (120 mg daily) and amoxycillin (2.25 g daily) for 14 days to eradicate H pylori. In addition to histology, PCR was used to examine proliferation of monoclonal B cells before treatment and during follow-up. All patients had at least two post-treatment examinations, and all became negative for H pylori, 2 after a second treatment course. On histology, 23 (70%) patients showed complete regression and 4 (12%) partial regression of lymphoma. 6 (18%) patients had no change after cure of H pylori infection. 1 was treated with chemotherapy. Of 5 treated surgically, 4 were found to have high-grade B-cell lymphoma on histology of the resected stomach and 1 a high-grade T-cell lymphoma. PCR showed complete disappearance of monoclonal B cells after cure of H pylori infection in 13 of 16 patients investigated. During median follow-up of 1 year no relapse of MALT lymphoma occurred. Low-grade primary gastric MALT lymphoma can completely regress after eradication of H pylori infection. However, longer follow-up is needed to clarify whether the remission is lasting.
authors.affiliation: Medical Department II, Klinikum Grosshadern, University of Munich, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Bayerdörffer
authors.forename: A
authors.initials: A
authors.lastname: Neubauer
authors.forename: B
authors.initials: B
authors.lastname: Rudolph
authors.forename: C
authors.initials: C
authors.lastname: Thiede
authors.forename: N
authors.initials: N
authors.lastname: Lehn
authors.forename: S
authors.initials: S
authors.lastname: Eidt
authors.forename: M
authors.initials: M
authors.lastname: Stolte
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000658:Amoxicillin / Q000627:therapeutic use; D005260:Female; D005500:Follow-Up Studies; D005756:Gastritis / Q000150:complications / Q000188:drug therapy* / Q000382:microbiology; D016481:Helicobacter Infections / Q000150:complications / Q000188:drug therapy*; D016480:Helicobacter pylori; D006801:Humans; D018442:Lymphoma, B-Cell, Marginal Zone / Q000188:drug therapy / Q000382:microbiology* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009853:Omeprazole / Q000627:therapeutic use; D013274:Stomach Neoplasms / Q000188:drug therapy / Q000382:microbiology* / Q000473:pathology
chemical_list: D000658:Amoxicillin; D009853:Omeprazole