Phenotypic analysis of peripheral T cell lymphoma among the Japanese.
From 1980 to 1990, 174 peripheral T cell lymphomas were studied morphologically and immunophenotypically with a panel of monoclonal antibodies which were reactive with T cell differentiation antigens in cryostat sections and/or cell suspensions. Histologically, 57% of the lymphomas were categorized into low-grade tumors according to the updated Kiel classification, while 41% were high-grade tumors. By immunologic studies, 50% of the lymphomas were of helper/inducer (CD4) phenotype, 6% were of cytotoxic/suppressor (CD8) phenotype, 3% expressed both CD4 and CD8, 3% lacked both CD4 and CD8, and 36% were phenotypically undetermined because of an admixture of a fairly even number of CD4 and CD8-positive cells. The phenotypically undetermined cases were more frequently noted in the low-grade groups than in the high-grade group, and the latter often showed a loss of pan-T antigens, although there was no definite correlation between the histologic category and the immunophenotype. CD25, which is strongly manifested in anti-HTLV-1 antibody-positive cases, was negative or only weakly expressed in anti-HTLV-1 antibody-negative cases. Anaplastic large cell lymphomas (LC-Ana) strongly expressed CD30, which was also detectable in only large blast-like cells in the low-grade tumors. Seventy-one per cent of the lymphomas expressed Ia antigens. In this series, the clinical data were available on 154 patients. For individual markers, the expression of CD30 and HLA-DR were associated with a longer actuarial survival (P < 0.01 and P < 0.05 by the generalized Wilcoxon test). The absence of CD25 or the presence of CD3 on tumor cells correlated with a relatively favorable prognosis, but not significantly. The detection of CD4 and CD8 had relatively little prognostic value. In the cases excluding LC-Ana, a significant difference was also recognized between the groups with and without CD25, CD30 and HLA-DR (P < 0.05 by the generalized Wilcoxon test). These results suggest that the immunophenotypic analysis of peripheral T cell lymphoma provided its use as an adjunct to a histopathologic diagnosis and was related to prognostic prediction.
Department of Pathology, Aichi Cancer Center Hospital, Nagoya, Japan.
S
S
Nakamura
T
T
Koshikawa
K
K
Koike
K
K
Kitoh
H
H
Suzuki
A
A
Oyama
T
T
Motoori
M
M
Kojima
M
M
Ogura
S
S
Kurita
D015415:Biomarkers; D006801:Humans; D016130:Immunophenotyping; D007564:Japan; D016411:Lymphoma, T-Cell, Peripheral / Q000276:immunology* / Q000401:mortality* / Q000473:pathology; D011379:Prognosis; D016019:Survival Analysis
D015415:Biomarkers