PMID- 21840231 OWN - NLM STAT- MEDLINE DCOM- 20141112 LR - 20151119 IS - 1532-8198 (Electronic) IS - 1092-9134 (Linking) VI - 16 IP - 6 DP - 2012 Dec TI - Colonic in situ mantle cell lymphoma. PG - 508-14 LID - S1092-9134(11)00080-3 [pii] LID - 10.1016/j.anndiagpath.2011.05.001 [doi] AB - This report describes the first case, to our knowledge, of in situ mantle cell lymphoma (MCL) in the gastrointestinal tract identified retrospectively by immunostains and fluorescence in situ hybridization (FISH) analysis after progression to disseminated disease with pleomorphic morphology several years later. A 45-year-old man with blood per rectum underwent colonoscopy and had random biopsies interpreted as benign colonic mucosa. Two years later, he presented with ileocolic intussusception related to enlarged lymph nodes. Biopsies on the second presentation demonstrated widespread MCL. Reevaluation of the original colonic biopsies showed cyclin D1-positive cells within small lymphoid aggregates, confirmed by FISH for t(11;14). Postchemotherapy, lymphoid aggregates in colonic biopsies showed scattered cyclin D1- and FISH t(11;14)-positive cells, similar to the original in situ lymphoma. We discuss this case in the context of the current understanding of the evolution of MCL and the difficulties associated with detecting primary GI lymphoma. CI - Published by Elsevier Inc. FAU - Neto, Antonio G AU - Neto AG AD - Department of Pathology and Laboratory Medicine, VA Connecticut Healthcare System, West Haven, CT 06516, USA. FAU - Oroszi, Gabor AU - Oroszi G FAU - Protiva, Petr AU - Protiva P FAU - Rose, Michal AU - Rose M FAU - Shafi, Nelofar AU - Shafi N FAU - Torres, Richard AU - Torres R LA - eng PT - Case Reports PT - Journal Article DEP - 20110812 PL - United States TA - Ann Diagn Pathol JT - Annals of diagnostic pathology JID - 9800503 RN - 0 (Biomarkers, Tumor) RN - 136601-57-5 (Cyclin D1) SB - IM MH - Biomarkers, Tumor/*metabolism MH - Biopsy MH - Carcinoma in Situ/drug therapy/genetics/metabolism/*pathology MH - Chromosomes, Human, Pair 11 MH - Chromosomes, Human, Pair 14 MH - Colonic Neoplasms/drug therapy/genetics/metabolism/*pathology MH - Colonoscopy MH - Cyclin D1/metabolism MH - Disease Progression MH - Humans MH - In Situ Hybridization, Fluorescence MH - Intestinal Mucosa/pathology MH - Lymph Nodes/pathology MH - Lymphoma, Mantle-Cell/drug therapy/genetics/metabolism/*pathology MH - Male MH - Middle Aged MH - Retrospective Studies MH - Translocation, Genetic EDAT- 2011/08/16 06:00 MHDA- 2014/11/13 06:00 CRDT- 2011/08/16 06:00 PHST- 2011/02/23 00:00 [received] PHST- 2011/04/18 00:00 [revised] PHST- 2011/05/09 00:00 [accepted] PHST- 2011/08/16 06:00 [entrez] PHST- 2011/08/16 06:00 [pubmed] PHST- 2014/11/13 06:00 [medline] AID - S1092-9134(11)00080-3 [pii] AID - 10.1016/j.anndiagpath.2011.05.001 [doi] PST - ppublish SO - Ann Diagn Pathol. 2012 Dec;16(6):508-14. doi: 10.1016/j.anndiagpath.2011.05.001. Epub 2011 Aug 12.