title: [Primary diffuse large B-cell lymphoma of the rectum simulating a rectal adenocarcinoma].
abstract: Colorectal lymphoma is an extremely infrequent entity, representing less than 0.5% of all primary colorectal neoplasms. Colorectal localization accounts for 15-20% of all gastrointestinal lymphomas, after the stomach and small intestine. Because the symptoms are non-specific, this disease is usually diagnosed in the advanced stages. Dawson's criteria are highly useful in the differential diagnosis between primary colorectal involvement and gastrointestinal tract involvement secondary to systemic lymphoma, which is important due to the distinct prognosis and treatment of these entities. We report the case of a B-cell non-Hodgkin's lymphoma that was difficult to diagnose and was treated with R-CHOP polychemotherapy. Outcome was poor.
authors.affiliation: Unidad de Aparato Digestivo, Servicio de Medicina Interna, Hospital Comarcal Antequera, Antequera, Málaga, España. drmarindig@hotmail.com
authors.forename: David
authors.initials: D
authors.lastname: Marín García
authors.forename: Francisco
authors.initials: F
authors.lastname: Cárdenas Lafuente
authors.forename: María Del Carmen
authors.initials: Mdel C
authors.lastname: Utrilla Ayala
authors.forename: María Victoria
authors.initials: MV
authors.lastname: Galán Jurado
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Jiménez Martín
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: García Ordóñez
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000473:pathology; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D003113:Colonoscopy; D003520:Cyclophosphamide / Q000627:therapeutic use; D003937:Diagnosis, Differential; D004317:Doxorubicin / Q000627:therapeutic use; D006801:Humans; D007150:Immunohistochemistry; D016403:Lymphoma, Large B-Cell, Diffuse / Q000175:diagnosis* / Q000188:drug therapy / Q000401:mortality / Q000473:pathology / Q000601:surgery; D008297:Male; D015201:Meta-Analysis as Topic; D008875:Middle Aged; D009367:Neoplasm Staging; D011241:Prednisone / Q000627:therapeutic use; D011379:Prognosis; D011860:Radiography, Abdominal; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000188:drug therapy / Q000401:mortality / Q000473:pathology / Q000601:surgery; D012007:Rectum / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014750:Vincristine / Q000627:therapeutic use
chemical_list: D014750:Vincristine; D004317:Doxorubicin; D003520:Cyclophosphamide; D011241:Prednisone