Abstract
Distinguishing between low-grade primary cutaneous B-cell lymphoma (LG-pCBCL) and cutaneous lymphoid hyperplasia (CLH) based on histological features is often difficult. CLH lesions contain numerous reactive cells of the histiocyte lineage [Langerhans cells (LC), dermal dendritic cells (DDC), and macrophages], which are also often present in CBCL. The aim of this study was to determine whether immunohistochemical detection of those cells could help differentiate between CLH and LG-pCBCL. We determined the percentages of those histiocytic cells in the dermal infiltrates of 45 cases of cutaneous lymphoproliferations comprising 16 CLH and 29 LG-pCBCL (19 follicle-center cell lymphomas and 10 marginal zone lymphomas) by immunohistochemical labeling with antibodies to CD1a, FXIIIa, and CD68 to respectively detect LC, DDC, and macrophages. To avoid observer-dependent bias, an automated morphometric analysis method was used to recognize immunoreactive cells and calculate their percentages within the infiltrate. FXIIIa+ cells were significatively more frequent in CLH than in LG-pCBCL, whereas CD1a+ and CD68+ cell frequencies were comparable in the two groups. The results of our study suggest that DDC might play an important role in the genesis of cutaneous lymphomas.
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Abbreviations
- CLH:
-
cutaneous lymphoid hyperplasia
- CTCL:
-
cutaneous T cell lymphoma
- DC:
-
dendritic cell
- DDC:
-
dermal dendritic cell
- FCL:
-
follicle-center cell lymphoma
- LC:
-
Langerhans cell
- LG-pCBCL:
-
low-grade primary cutaneous B cell lymphoma
- MF:
-
mycosis fungoides
- MZL:
-
marginal zone lymphoma
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We thank Olivier Hongtuanha and Charles Homsi (IMSTAR company) for technical help.
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Carbonnelle, A., Martin-Garcia, N., Ortonne, N. et al. Study of the reactive dendritic cells in small B-cell lymphoproliferations of the skin. Virchows Arch 450, 441–447 (2007). https://doi.org/10.1007/s00428-007-0372-0
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DOI: https://doi.org/10.1007/s00428-007-0372-0