title: Clusterin, a marker for anaplastic large cell lymphoma immunohistochemical profile in hematopoietic and nonhematopoietic malignant neoplasms.
abstract: We evaluated the immunohistochemical staining profile of clusterin in paraffin sections of 143 neoplasms (non-Hodgkin lymphoma, 83, including 41 anaplastic large cell lymphomas [ALCLs]; Hodgkin lymphoma, 17; primary and metastatic carcinoma, 30; and other neoplasms, 13). In 40 of 41 ALCLs (34 systemic, 7 cutaneous), neoplastic cells revealed clusterin reactivity characterized by a Golgi staining pattern. The proportion of reactive cells varied with more than 25% positive cells in the majority of cases. In 7 non-Hodgkin lymphomas of other types, fine cytoplasmic (3 cases) or strong membranous reactivity (4 cases) was observed for clusterin. In Hodgkin lymphoma, rare Reed-Sternberg cells exhibited focal cytoplasmic or membranous clusterin positivity. In the nonhematopoietic neoplasms, a Golgi staining pattern was apparent in only 2 cases, 1 lobular carcinoma of the breast and 1 poorly differentiated colonic carcinoma; however, cytoplasmic reactivity was noted in 12 of 30 carcinomas and 1 of 5 neuroendocrine neoplasms. A Golgi pattern of reactivity for clusterin seems highly characteristic of ALCL among hematopoietic neoplasms, but also might be observed in rare nonhematopoietic tumors, necessitating the use of a broad immunohistochemical panel for evaluation of poorly differentiated neoplasms of indeterminate derivation.
authors.affiliation: Department of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115, USA.
authors.forename: Alessandra F
authors.initials: AF
authors.lastname: Nascimento
authors.forename: Jack L
authors.initials: JL
authors.lastname: Pinkus
authors.forename: Geraldine S
authors.initials: GS
authors.lastname: Pinkus
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000077548:Anaplastic Lymphoma Kinase; D014408:Biomarkers, Tumor / Q000032:analysis*; D002452:Cell Count; D002648:Child; D002675:Child, Preschool; D051152:Clusterin; D005260:Female; D006023:Glycoproteins / Q000032:analysis*; D006689:Hodgkin Disease / Q000378:metabolism; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods; D007223:Infant; D017728:Lymphoma, Large-Cell, Anaplastic / Q000737:chemistry* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D018832:Molecular Chaperones / Q000032:analysis*; D009363:Neoplasm Proteins / Q000032:analysis*; D009369:Neoplasms / Q000737:chemistry; D011505:Protein-Tyrosine Kinases / Q000032:analysis; D020794:Receptor Protein-Tyrosine Kinases; D016539:Reed-Sternberg Cells / Q000737:chemistry / Q000473:pathology; D012189:Retrospective Studies
chemical_list: D014408:Biomarkers, Tumor; C495242:CLU protein, human; D051152:Clusterin; D006023:Glycoproteins; D018832:Molecular Chaperones; D009363:Neoplasm Proteins; D000077548:Anaplastic Lymphoma Kinase; D011505:Protein-Tyrosine Kinases; D020794:Receptor Protein-Tyrosine Kinases