title: Gastrointestinal lymphomas: entities and mimics.
abstract: The gastrointestinal tract is the most common extranodal site of lymphoma involvement. Although B-cell lymphomas are by far the most frequent type found in this location, gastrointestinal lymphomas are a diverse group of neoplasms, many of which are characterized by distinctive clinicopathologic settings. Diffuse large B-cell lymphoma and marginal-zone lymphoma of mucosa-associated lymphoid tissue are commonly encountered, but other less-common entities can pose diagnostic challenges, mimicking both benign, reactive conditions and each other. We describe several different lymphoma subtypes, with a focus on frequently encountered challenges in differential diagnosis.
authors: Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA. lbsmith@umich.edu
authors: Lauren B
authors: LB
authors: Smith
authors: Scott R
authors: SR
authors: Owens
mesh_terms: D000293:Adolescent; D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis* / Q000473:pathology*; D041981:Gastrointestinal Tract / Q000473:pathology*; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology; D008223:Lymphoma / Q000175:diagnosis* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D019310:Pseudolymphoma / Q000175:diagnosis / Q000473:pathology