Helicobacter pylori-associated MALT lymphoma.
The commonest type of upper gastrointestinal tract lymphoma is the Helicobacter -driven B cell MALT lymphoma of the stomach (MALT being the acronym for mucosa-associated lymphoid tissue). This has pathognomonic endoscopic appearances. Figure
2.402 shows the untreated lesion and Fig 2.404 the appearances after two weeks' anti-
H. pylori therapy. Complete resolution ensued. Figure 2.401 demonstrates cytokeratin staining of lyphmoepithelial lesions in a MALT lymphoma.
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