PMID- 22090393 OWN - NLM STAT- MEDLINE DCOM- 20120307 LR - 20111117 IS - 1940-2465 (Electronic) IS - 1066-8969 (Linking) VI - 19 IP - 5 DP - 2011 Oct TI - Composite mantle cell and diffuse large B-cell lymphoma: report of two cases. PG - 643-8 LID - 10.1177/1066896911405656 [doi] AB - Composite lymphomas are rare and involve the concurrent evolution of 2 distinct lymphoma types within a single organ or tissue. This study describes 2 cases of composite mantle cell lymphoma (MCL) and diffuse large B-cell lymphoma (DLBCL), which has not previously been reported. Each case demonstrated distinct populations of CD20 positive small and large atypical B cells. In both cases, only the small lymphocytes were positive for CD5 and cyclin D1, and fluorescence in situ hybridization (FISH) showed a t(11;14) translocation in the small lymphocytes but not in the large cells. Molecular studies for B-cell clonality showed a possible clonal relationship between the 2 components in one case but not the other. This study describes in detail the morphology, immunophenotype, FISH, and molecular analysis of both components in each case. To the authors' knowledge, this represents the first report of juxtaposition of MCL with DLBCL that does not represent transformation of the mantle cell component. FAU - Ho, Albert K AU - Ho AK AD - University of Utah, Salt Lake City, UT, USA. albert.ho@hsc.utah.edu FAU - Teman, Carolin J AU - Teman CJ FAU - Smith, Gregory P AU - Smith GP FAU - Nightingale, Daniel R AU - Nightingale DR FAU - Miles, Rodney R AU - Miles RR LA - eng PT - Case Reports PT - Journal Article PL - United States TA - Int J Surg Pathol JT - International journal of surgical pathology JID - 9314927 SB - IM MH - Aged MH - Aged, 80 and over MH - Humans MH - Immunohistochemistry MH - Immunophenotyping MH - In Situ Hybridization, Fluorescence MH - Laser Capture Microdissection MH - Lymphoma, Large B-Cell, Diffuse/genetics/metabolism/*pathology MH - Lymphoma, Mantle-Cell/genetics/metabolism/*pathology MH - Male MH - Neoplasms, Multiple Primary/genetics/metabolism/*pathology MH - Polymerase Chain Reaction EDAT- 2011/11/18 06:00 MHDA- 2012/03/08 06:00 CRDT- 2011/11/18 06:00 PHST- 2011/11/18 06:00 [entrez] PHST- 2011/11/18 06:00 [pubmed] PHST- 2012/03/08 06:00 [medline] AID - 19/5/643 [pii] AID - 10.1177/1066896911405656 [doi] PST - ppublish SO - Int J Surg Pathol. 2011 Oct;19(5):643-8. doi: 10.1177/1066896911405656.