title: A clinicopathologic and immunohistochemical study of diffuse large B-cell lymphoma.
abstract: OBJECTIVE
  To study the clinicopathologic and immunohistochemical features of diffuse large B-cell lymphoma (DLBCL) and the significance of immunohistochemistry in diagnosis and differential diagnosis of DLBCL.
  
  
  METHODS
  60 cases of DLBCL were studied and immunohistochemical staining for LCA, L26, BLA-36, CD30, bcl-6 were carried out with the EnVision 2 step method.
  
  
  RESULTS
  The age range of 76.7% (46/60) patients was 40 - 70 years. The location of the lesion includes nodal and extranodal sites. 90.0% (54/60) were in clinical stages of II (24/54), III (21/54), IV (9/54). Histopathologic morphology presented as centroblastic (88.3%, 53/60), immunoblastic (3.3%, 2/60), anaplastic large B cell type (3.3%, 2/60) and T cell rich B cell type (5.0%, 3/60). Immunostaining showed 100% (60/60) DLBCL were positive for LCA, L26, BLA36, 3.3% (2/60) DLBCL positive for CD30, 95% (57/60) expressed bcl-6 protein.
  
  
  CONCLUSIONS
  DLBCL is an aggressive lymphoma which shows cytologic variability from case to case. The evaluation of pathologic features and immunohistochemistry in DLBCL are useful and practical for diagnostic purposes, but cannot delineate distinctive morphologic subtypes.
authors.affiliation: Department of Pathology, Cancer Hospital, Fudan University, Shanghai 200032, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Tao
authors.forename: Xiongzeng
authors.initials: X
authors.lastname: Zhu
authors.forename: Weiling
authors.initials: W
authors.lastname: Xu
authors.forename: Zhongwei
authors.initials: Z
authors.lastname: Chen
authors.forename: Hongfen
authors.initials: H
authors.lastname: Lu
mesh_terms: D000328:Adult; D000368:Aged; D018951:Antigens, CD20 / Q000032:analysis; D004268:DNA-Binding Proteins / Q000032:analysis; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D017730:Ki-1 Antigen / Q000032:analysis; D017493:Leukocyte Common Antigens / Q000032:analysis; D016393:Lymphoma, B-Cell / Q000378:metabolism / Q000473:pathology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011518:Proto-Oncogene Proteins / Q000032:analysis; D051560:Proto-Oncogene Proteins c-bcl-6; D014157:Transcription Factors / Q000032:analysis
chemical_list: D018951:Antigens, CD20; D004268:DNA-Binding Proteins; D017730:Ki-1 Antigen; D011518:Proto-Oncogene Proteins; D051560:Proto-Oncogene Proteins c-bcl-6; D014157:Transcription Factors; D017493:Leukocyte Common Antigens