Varied B-cell immunophenotypes of Hodgkin/Reed-Sternberg cells in classic Hodgkin's disease.
OBJECTIVE
Recent analyses have suggested that Hodgkin's or Reed-Sternberg (HRS) cells in most cases of classic Hodgkin's disease are derived from germinal centre B-cells. However, there is controversy over which B-cell antigens are expressed in HRS cells.


RESULTS
We studied 51 cases of classic Hodgkin's disease to immunohistochemically characterize HRS cells for pan-B-cell markers and specific markers for plasma cells. HRS cells expressed CD20 (L26) in 18 cases (35%), CD19 (B4) in nine (18%) and CD79a (mb-1) in 13 (25%). Furthermore, HRS cells were positive for CD138 (B-B4) in 24 cases (45%) and for PCA-1 in 24 (45%). In 41 (80%) cases, HRS cells expressed more than one B-cell marker. We then subclassified cases into those positive for plasma cell markers (n = 27) (group 1) and those negative for them (n = 24) (group 2). The average age in group 1 (40 years) was younger than in group 2 (54 years) (P < 0.05). The percentage of nodular sclerosis (NS) subtype in group 1 (52%) was 1.5 times greater than in group 2 (33%) (P < 0.05). With regard to Epstein-Barr virus encoded small RNA (EBER) in-situ hybridization, 14 cases (64%) were positive in group 2, but only seven cases (31%) were positive in group 1 (P < 0.025).


CONCLUSIONS
In most cases of classic Hodgkin's disease, HRS cells expressed later stage of B-cell development. We consider that two different clinicopathological groups may correlate with the two different expressions of B-cell markers.
Watanabe
K
K
First Department of Pathology, Nagoya University School of Medicine, Nagoya, Japan.
Yamashita
Y
Y
Nakayama
A
A
Hasegawa
Y
Y
Kojima
H
H
Nagasawa
T
T
Mori
N
N
D000293:Adolescent; D000328:Adult; D000368:Aged; D000944:Antigens, Differentiation, B-Lymphocyte / Q000378:metabolism; D001402:B-Lymphocytes / Q000276:immunology* / Q000473:pathology; D002454:Cell Differentiation; D002648:Child; D002675:Child, Preschool; D005260:Female; D004854:Herpesvirus 4, Human / Q000235:genetics / Q000302:isolation & purification; D006689:Hodgkin Disease / Q000145:classification / Q000276:immunology* / Q000473:pathology; D006801:Humans; D016130:Immunophenotyping; D017403:In Situ Hybridization; D008297:Male; D008875:Middle Aged; D010950:Plasma Cells / Q000276:immunology / Q000473:pathology; D016539:Reed-Sternberg Cells / Q000276:immunology* / Q000473:pathology
D000944:Antigens, Differentiation, B-Lymphocyte