Premium
Phenotypic overlaps between pleomorphic malignant T‐cell lymphomas and mixed‐cellularity Hodgkin's disease
Author(s) -
Tosi Piero,
Leoncini Lorenzo,
del Vecchio Maria Teresa,
Spina Donatella,
Lorenzini Letizia,
Barbini Paolo,
Massai Maria Rita,
Pileri Stefano,
Sabattini Elena,
Kraft Rainer,
Cottier Hans
Publication year - 1992
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.2910520208
Subject(s) - pathology , cd43 , biology , cd30 , immunophenotyping , immunohistochemistry , lymphoma , cd3 , cd8 , medicine , antigen , immunology , cd20
Histologically diagnosed, or in part questionable, malignant pleomorphic peripheral T‐cell lymphomas (pPTCLs, n = 16) and mixed‐cellularity Hodgkin's disease (MCHD, n = 12) were objectively compared by the use of combined immunohistochemistry on paraffin sections, test‐point analysis of tissue components, and semi‐automated nuclear morphometry on semi‐thin resin sections. Classical, qualitative histomorphological distinction of these sub‐types of lymphomas proved to be valid and is probably still the best method. Quantitative discriminant features, in order of decreasing significance, were: (i) expression by large atypical cells (LACs) of CD45RO, CD43 and CD45 in pPTCLs, and of CD30 and GD15 in MCHD; (ii) means and standard deviations (SDs) of LAC nuclear‐profile areas (greater in MCHD than in pPTCLs); (iii) expression of CD3 by LACs in pPTCLs; (iv) prominence of small lymphoid cells in MCHD; (v) higher percentage of medium‐sized lymphoid cells in pPTCLs; and (vi) higher SDs of nuclear‐profile circularity factor of small lymphoid cells in MCHD. The medians of the largest nucleolar profile areas in LACs per field did not differ in pPTCLs and MCHD, but dispersion of individual values towards higher levels was significantly greater in the latter. Stepwise discriminant analysis of test point and nucleometric variables that best distinguished pPTCLs from MCHD revealed considerable overlaps, and questionable cases tended to be intermediate between the two. In conclusion, our results confirm and expand the notion of intra‐group heterogeneity, with indistinct borders and the existence of intermediate phenotypes between these two taxonomic categories of malignant lymphomas. © 1992 Wiley‐Liss, Inc.