title: Paraffin immunoreactivity of CD10, CDw75, and Bcl-6 in follicle center cell lymphoma.
abstract: Follicle center cell lymphoma(FCCL) has the following immunophenotype(IP): sIg+, Pan B+, CD10+/-, CD5-, CD23-/+, CD43-, CD11c-, CD25-. In addition, reactivities of a malignant lymphoma with CDw75(LN-1) and bcl-6 are considered indicators of FCCL. Bcl-6 expression is common in Grade 1 FCCL (100%) and rare in other indolent B-cell lymphomas(BCL). In contrast, bcl-2 expression is common in FCCL (80%) and in other BCL subtypes. Since no previous study has correlated paraffin immunoreactivity(PIR) of CD10, CDw75, and bcl-6 in FCCL (Grades 1-3), this is this study's purpose. Twenty-nine FCCL's were identified and reviewed (6, Grade 1; 10, Grade 2; 13, Grade 3) from the Division of Hematopathology, St. Louis University. The diagnoses were based on morphology and immunohistochemistry(IH)(21 cases) +/- the flow cytometric IP(14 cases). The paraffin blocks were stained for CD10 (Novacastra, Vector Laboratories, Burlingame, CA), CDw75 and bcl-6 (DAKO Corporation, Carpinteria, CA). Results showed that, CD10 by paraffin IH(PIH) was positive in 23 [18(strong); 3(moderate); 2(weak)] and negative in 6(3, Grade 2; 3, Grade 3). All CD10-cases were CDw75+; 4, bcl-6+. The two CD10-, bcl-6-cases were Grade 2. CDw75 was positive in 28 cases [16(strong); 11(moderate); 1(weak)] and negative in 1 (Grade 3; CD10+, bcl-2+, bcl-6+). Bcl-6 was positive in 26 [16(strong); 6(moderate); 4(weak)] and negative in 3(Grade 2's). Thus, the sensitivity of CD10, CDw75, and bcl-6 by PIH for FCCL was 79%, 97%, and 90%, respectively. Of the three stains evaluated by PIH in FCCL, CDw75 was the most sensitive, closely followed by bcl-6. CD10 was least sensitive-79%. By combining these 3 stains, the sensitivity was 100%; thus, a combined approach is recommended.
authors.affiliation: Division of Hematopathology, Department of Pathology, St. Louis University Health Sciences Center St. Louis, Missouri, MO 63104, USA. dunphyc@slucare1.sluh.edu
authors.forename: C H
authors.initials: CH
authors.lastname: Dunphy
authors.forename: J M
authors.initials: JM
authors.lastname: Polski
authors.forename: H
authors.initials: H
authors.lastname: Lance Evans
authors.forename: L J
authors.initials: LJ
authors.lastname: Gardner
mesh_terms: D015703:Antigens, CD / Q000276:immunology / Q000378:metabolism; D000951:Antigens, Neoplasm / Q000276:immunology* / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000276:immunology* / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000276:immunology / Q000378:metabolism; D006801:Humans; D007150:Immunohistochemistry; D008224:Lymphoma, Follicular / Q000737:chemistry* / Q000175:diagnosis* / Q000473:pathology; D015260:Neprilysin / Q000276:immunology / Q000378:metabolism; D016612:Paraffin Embedding / Q000379:methods; D011518:Proto-Oncogene Proteins / Q000276:immunology / Q000378:metabolism; D051560:Proto-Oncogene Proteins c-bcl-6; D012799:Sialyltransferases; D013194:Staining and Labeling / Q000379:methods*; D014157:Transcription Factors / Q000276:immunology / Q000378:metabolism; D000094802:beta-D-Galactoside alpha 2-6-Sialyltransferase
chemical_list: D015703:Antigens, CD; D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; D004268:DNA-Binding Proteins; D015260:Neprilysin; D011518:Proto-Oncogene Proteins; D051560:Proto-Oncogene Proteins c-bcl-6; D012799:Sialyltransferases; D014157:Transcription Factors; C093493:ST6GAL1 protein, human; D000094802:beta-D-Galactoside alpha 2-6-Sialyltransferase