title: Primary duodenal MALT lymphoma.
abstract: Primary duodenal MALT lymphoma (MALToma) is a very rare neoplasm arising from the mucosa-associated lymphoid tissue of the duodenum. We report a 55-year-old woman with MALToma located in the descending duodenum and accompanying Helicobacter pylori infection of the stomach. We performed operative resection due to involvement of the papilla of Vater and submucosal tumor infiltration. Despite wide mucosal spreading, postoperative examination revealed only a small amount of MALToma cells infiltrating into the submucosa. No invasion into the adjacent structure or metastasis to regional lymph nodes was confirmed, suggesting the disease could have been controlled by eradication of Helicobacter pylori.
authors.affiliation: Department of Internal Medicine, School of Dentistry at Niigata, The Nippon Dental University.
authors.forename: M
authors.initials: M
authors.lastname: Toshima
authors.forename: K
authors.initials: K
authors.lastname: Aikawa
authors.forename: K
authors.initials: K
authors.lastname: Soga
authors.forename: K
authors.initials: K
authors.lastname: Shibasaki
authors.forename: K
authors.initials: K
authors.lastname: Yoshida
authors.forename: I
authors.initials: I
authors.lastname: Emura
mesh_terms: D004379:Duodenal Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D018442:Lymphoma, B-Cell, Marginal Zone / Q000473:pathology*; D008875:Middle Aged