title: A subset of CD5- diffuse large B-cell lymphomas expresses nuclear cyclin D1 with aberrations at the CCND1 locus.
abstract: In 231 diffuse large B-cell lymphomas, the expression of cyclin D1 and CD5 was evaluated. All cases were CD5-. Ten (4.3%) were positive for cyclin D1 and were subjected to fluorescence in situ hybridization at the CCND1 locus. One case showed the t(11;14). In another case, the telomeric probe signal for cyclin D1 was lost in most tumor cells, and in a small proportion of the cells, there were fluorescence signals indicative of the t(11;14). Two other cases displayed additional cyclin D1 signals in the absence of the t(11;14). All cases but 1 were positive for bcl-6 or MUM1, disfavoring the possibility of misdiagnosed blastoid variants of CD5- mantle cell lymphomas. Thus, contrary to the current view, there seems to exist a certain number of cyclin D1+ and CD5- diffuse large B-cell lymphomas, some of which have structural aberrations at the CCND1 locus, including the t(11;14).
authors.affiliation: Departments of Pathology, Lund University Hospital, Lund, Sweden.
authors.forename: Mats
authors.initials: M
authors.lastname: Ehinger
authors.forename: Johan
authors.initials: J
authors.lastname: Linderoth
authors.forename: Birger
authors.initials: B
authors.lastname: Christensson
authors.forename: Birgitta
authors.initials: B
authors.lastname: Sander
authors.forename: Eva
authors.initials: E
authors.lastname: Cavallin-Ståhl
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000378:metabolism; D018956:CD5 Antigens / Q000378:metabolism*; D002452:Cell Count; D002467:Cell Nucleus / Q000378:metabolism* / Q000473:pathology; D002869:Chromosome Aberrations; D056741:Cyclin D; D016213:Cyclins / Q000378:metabolism*; D004273:DNA, Neoplasm / Q000032:analysis; D004268:DNA-Binding Proteins / Q000378:metabolism; D005260:Female; D019085:Fluorescent Antibody Technique, Direct; D006801:Humans; D007124:Immunoenzyme Techniques; D017404:In Situ Hybridization, Fluorescence; D050835:Interferon Regulatory Factors / Q000378:metabolism; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D051560:Proto-Oncogene Proteins c-bcl-6; D000099218:Interferon Regulatory Factor-4
chemical_list: D014408:Biomarkers, Tumor; D018956:CD5 Antigens; D056741:Cyclin D; D016213:Cyclins; D004273:DNA, Neoplasm; D004268:DNA-Binding Proteins; D050835:Interferon Regulatory Factors; D051560:Proto-Oncogene Proteins c-bcl-6; D000099218:Interferon Regulatory Factor-4; C084103:BCL6 protein, human