title: A rare cause of melena: gastric and duodenal diffuse large B-cell lymphoma.
authors.affiliation: Department of Gastroenterology, Faculty of Medicine, Centro Hospitalar S. Joao, Porto, Portugal;Email:joao.claudio.antunes@gmail.com.
authors.forename: João
authors.initials: J
authors.lastname: Santos-Antunes
authors.forename: Rosa
authors.initials: R
authors.lastname: Ramalho
authors.forename: Susana
authors.initials: S
authors.lastname: Lopes
authors.forename: Guilherme
authors.initials: G
authors.lastname: Macedo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis; D004379:Duodenal Neoplasms / Q000150:complications* / Q000276:immunology / Q000473:pathology; D016145:Endoscopy, Digestive System; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D016403:Lymphoma, Large B-Cell, Diffuse / Q000150:complications* / Q000276:immunology / Q000473:pathology; D008551:Melena / Q000209:etiology*; D009102:Multiple Organ Failure / Q000209:etiology; D013274:Stomach Neoplasms / Q000150:complications* / Q000276:immunology / Q000473:pathology
chemical_list: D014408:Biomarkers, Tumor