An immunohistochemical study of the bone marrow lesions of systemic mastocytosis - Expression of stem cell factor by lesional mast cells

被引:18
作者
Akin, C
Jaffe, ES
Raffeld, M
Kirshenbaum, AS
Daley, T
Noel, P
Metcalfe, DD
机构
[1] NCI, Hematopathol Sect, Pathol Lab, Bethesda, MD 20892 USA
[2] NIH, Hematol Serv, Dept Lab Med, Ctr Clin, Bethesda, MD 20892 USA
关键词
mastocytosis; mast cells; stem cell factor; B lymphocytes; T lymphocytes; Benign lymphoid aggregates; bone marrow;
D O I
10.1309/71KH-4JE4-E0J1-7THH
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
The bone marrow biopsy in mastocytosis often reveals characteristic mast cell collections associated with lymphoid cell aggregates. There is limited information on the composition of these aggregates and whether they, contain cytokines important to mast cell growth and development. We thus performed an immunohistochemical characterization of bone marrow lesions in 7 patients with systemic indolent mastocytosis. In nodular lesions, the collections of mast cells were surrounded by lymphoid aggregates; these aggregates consisted of a mixture of B and T cells. Immunohistochemical staining for stem cell factor (SCF) revealed the presence of this cytokine in the lesional mast cells with a granular staining pattern. These results show that the characteristic nodular lesions observed in bone marrow biopsy specimens of patients with mastocytosis bear features of benign lymphoid aggregates and that SCF is present in these lesions, creating a potential autocrine or paracrine growth and differentiation loop for mast cells and lymphoid progenitors.
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页码:242 / 247
页数:6
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