Sézary cells

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Synonym(s)

Lutzner cells

Definition
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Atypical lymphocytoid cells with T-cell markers.

Occurrence
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Among others, it occurs in cutaneous T-cell lymphoma, mycosis fungoides, lupus erythematosus, lichen planus, psoriasis, unspecific chronic dermatitis and in arthritis with synovial secretion.

Histology
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  • Cells with a large, indented core of 6-10 μm size.
  • Electron microscopy: Cerebriform nucleus, glycogen granules in the cytoplasm.
  • Blood smear: PAS positive.
  • Immunohistology: CD158k is expressed relatively constantly on Sezary cells (important diagnostic crystium) and acts as a co-inhibitory receptor which increases resistance to activation-induced cell death (apoptosis). Antibodies against CD158k may represent a therapeutic option.
  • CD164 and FCRL3 serve as further diagnostic markers.

Note(s)
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CD26 is discussed as a specific marker for Sézary cells.

Literature
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  1. Fierro MT et al (2006) Expression pattern of chemokine receptors and chemokine release in inflammatory erythroderma and Sezary syndrome. Dermatology 213: 284-292

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Last updated on: 29.10.2020