Mature B-Cell Neoplasms and Mature T-Cell and NK-Cell Neoplasms Slide Rulers
On-line Lymphoid Slide Ruler
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Cytometry, Beckman Coulter Inc. Marseille, France
(1) Waldenström macroglobulinema (9761/3) is found in a significant subset of patients with LPL with BM involvement and an IgM monoclonal gammopathy of
any concentration. (2) Typically IgM+, and less often IgA+ or IgG+.
(3) IgD is positive in a minority of the cases.
(4) IgM+/-, IgD, IgG or rarely IgA.
(5) More frequently with Lambda than Kappa restriction.
(6) The membrane expression of CD3 may be weak.
(7) 25% of patients coexpress CD8 with CD4, a feature
almost unique to T-PLL; 15% are CD4-neg, CD8-pos.
(8) Expression of CD94 and KIR families of receptors can be
detected in 50% or more of cases.
(9) Uncommon variants include CD4 TCRαβ-pos cases and TCRγδ-pos
cases; approximately 60% of the latter express CD8, the
remainder are CD4/CD8 double negative.
(10) Abnormal uniform expression of CD8 can be seen.
(11) KIR-pos cases preferentially express activating
receptor isoforms.
(12) If TCRαβ-pos, expect different immunophenotype for the
rest of the markers.
(13) A CD4-pos/CD8-neg phenotype predominates in nodal
cases. CD4/CD8 double positivity or double negativity is at
times seen.
For Research Use Only. Not for use in diagnostic procedures
Source: WHO Classification of Tumours of Hæmatopoietic and Lymphoid Tissues, 4th Edition, Swerdlow SH, Campo E, Harris NL,
Jaffe ES, Pileri SA, Stein H, Thiele J and Vardiman JW (Eds.): IARC Press, Lyon (2008).