title: Simultaneous occurrence of colonic adenocarcinoma and MALT lymphoma: A series of three cases.
abstract: Simultaneous development of adenocarcinoma and primary B cell lymphoma of mucosa-associated lymphoid tissue (MALT) lymphoma of the colon is rare; only one case has so far been reported out of 13 cases with the coexistence of colonic adenocarcinoma with involvement of the colon by lymphoma. We hereby present three more cases, two females (aged 75 and 71 years) and a male (aged 72 years). All three underwent colectomy based on a preoperative biopsy revealing colonic carcinoma. Histological examination of the resection specimens disclosed a colonic adenocarcinoma in two cases, whereas a tubulovillous adenoma with superficial foci of intraepithelial adenocarcinoma was seen in the third case. Moreover, in all three cases, a coexisting MALT lymphoma was diagnosed in the colon (1 case), in both colon and adjacent lymph nodes (1 case) or in colonic lymph nodes and omentum (1 case). In the last case, a post-operative bone marrow biopsy revealed extensive infiltration of the bone marrow, due to which the patient received postoperative chemotherapy. Diagnostic and treatment issues are briefly discussed.
authors.affiliation: Theodoros Argyropoulos, Periklis Foukas, Maria Kefala, Evmorfia Boltetsou, Ioannis G Panayiotides, 2nd Department of Pathology, University of Athens Medical School, "Attikon" University Hospital, Rimini1, GR-12464, Chaidari, Greece.
authors.forename: Theodoros
authors.initials: T
authors.lastname: Argyropoulos
authors.forename: Periklis
authors.initials: P
authors.lastname: Foukas
authors.forename: Maria
authors.initials: M
authors.lastname: Kefala
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Xylardistos
authors.forename: Sotirios
authors.initials: S
authors.lastname: Papageorgiou
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Machairas
authors.forename: Evmorfia
authors.initials: E
authors.lastname: Boltetsou
authors.forename: Anastasios
authors.initials: A
authors.lastname: Machairas
authors.forename: Ioannis G
authors.initials: IG
authors.lastname: Panayiotides