Leu-M1 antigen expression in advanced (tumor) stage mycosis fungoides.

Abstract:

:The authors describe two patients with clinically and histopathologically documented advanced (tumor) stage mycosis fungoides. In each case the large, pleomorphic neoplastic cells lacked the monoclonal antibody-defined cell surface antigens commonly associated with immature and mature T-cells, i.e., T11, Leu-1, T3, T4, T6, T8, and T10, but expressed various T-cell-associated activation antigens, such as HLA-DR, Tac, and T21. Leu-M1, a monocyte-associated antigen, was not expressed by the small, cerebriform neoplastic cells in the plaque stage lesions of either patient. However, Leu-M1 was expressed by most of the large, pleomorphic neoplastic cells present in the nodular lesions of both patients. The pattern of Leu-M1 antigen expression was identical to that previously reported in the Reed-Sternberg cells of Hodgkin's disease. Identification of these two patients suggests using caution in the interpretation of the results of immunophenotypic analysis of cutaneous lymphoid neoplasms and that Leu-M1 should not be used as a diagnostic indicator of Hodgkin's disease or a histiocytic-derived neoplasm. These studies also suggest that Leu-M1 may be preferentially expressed on a subpopulation of activated, rapidly proliferating, and/or dedifferentiated neoplastic T-cells that proliferate in the advanced (tumor) stages of mycosis fungoides.

journal_name

Am J Clin Pathol

authors

Wieczorek R,Suhrland M,Ramsay D,Reed ML,Knowles DM 2nd

doi

10.1093/ajcp/86.1.25

subject

Has Abstract

pub_date

1986-07-01 00:00:00

pages

25-32

issue

1

eissn

0002-9173

issn

1943-7722

journal_volume

86

pub_type

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