Pan B-cell markers are not redundant in analysis of chronic lymphocytic leukemia (CLL).

Sara A. Monaghan, LoAnn C. Peterson, Cathy James, Laura Marszalek, Adela Khoong, Dina J. Bachta, William J. Karpus, Charles L. Goolsby

Research output: Contribution to journalArticle

Abstract

BACKGROUND: The classic immunophenotype for chronic lymphocytic leukemia (CLL) is CD19(+), restricted dim surface expression of kappa or lambda light chain, CD5(+), CD23(+), dim CD20(+), negative FMC7, and negative CD79b. However, the necessity of assaying for all 3 pan B-cell markers (CD20, FMC7, and CD79b) by flow cytometry has not been definitively documented for CLL. METHODS: Qualitative patterns and semi-quantitative assessment of staining intensity for CD20, FMC7 and CD79b were performed in 70 cases with a current or prior diagnosis of CLL or CLL with increased prolymphocytes leukemia (CLL/PL). The concurrent morphology in 66 of 70 specimens was classified as typical CLL in 53 cases, CLL/PL in 10 cases, and large cell lymphoma in 3 cases. RESULTS: Forty percent of the cases varied from the characteristic immunophenotype by having moderate or bright staining of CD20 (36%), FMC7 (7%), and/or CD79b (18%). Discrepant qualitative staining patterns were found between FMC7 and CD20 (21%), CD20 and CD79b (15%), and CD79b and FMC7 (10%). Semiquantitative measurement of staining intensity showed little correlation between CD79b and CD20 or FMC7. Moderate correlation was seen between CD20 and FMC7. No correlation was observed between morphology and intensity of marker expression. CONCLUSIONS: Variable patterns and intensity of staining were seen for FMC7, CD20, and CD79b in this cohort of CLL samples. Dim or negative staining was most consistently seen for FMC7 (93% of specimens). Although FMC7 staining intensity was moderately correlated with CD20, CD79b intensity was poorly correlated with either CD20 or FMC7, and thus, may provide some independent information.

Original languageEnglish (US)
Pages (from-to)30-42
Number of pages13
JournalCytometry : the journal of the Society for Analytical Cytology
Volume56 B
Issue number1
StatePublished - Nov 2003

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B-Cell Chronic Lymphocytic Leukemia
B-Lymphocytes
Staining and Labeling
Negative Staining
Lymphoma
Flow Cytometry
Leukemia
Light

ASJC Scopus subject areas

  • Hematology
  • Cell Biology
  • Pathology and Forensic Medicine
  • Biophysics
  • Endocrinology

Cite this

Monaghan, S. A., Peterson, L. C., James, C., Marszalek, L., Khoong, A., Bachta, D. J., ... Goolsby, C. L. (2003). Pan B-cell markers are not redundant in analysis of chronic lymphocytic leukemia (CLL). Cytometry : the journal of the Society for Analytical Cytology, 56 B(1), 30-42.

Pan B-cell markers are not redundant in analysis of chronic lymphocytic leukemia (CLL). / Monaghan, Sara A.; Peterson, LoAnn C.; James, Cathy; Marszalek, Laura; Khoong, Adela; Bachta, Dina J.; Karpus, William J.; Goolsby, Charles L.

In: Cytometry : the journal of the Society for Analytical Cytology, Vol. 56 B, No. 1, 11.2003, p. 30-42.

Research output: Contribution to journalArticle

Monaghan, SA, Peterson, LC, James, C, Marszalek, L, Khoong, A, Bachta, DJ, Karpus, WJ & Goolsby, CL 2003, 'Pan B-cell markers are not redundant in analysis of chronic lymphocytic leukemia (CLL).', Cytometry : the journal of the Society for Analytical Cytology, vol. 56 B, no. 1, pp. 30-42.
Monaghan, Sara A. ; Peterson, LoAnn C. ; James, Cathy ; Marszalek, Laura ; Khoong, Adela ; Bachta, Dina J. ; Karpus, William J. ; Goolsby, Charles L. / Pan B-cell markers are not redundant in analysis of chronic lymphocytic leukemia (CLL). In: Cytometry : the journal of the Society for Analytical Cytology. 2003 ; Vol. 56 B, No. 1. pp. 30-42.
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abstract = "BACKGROUND: The classic immunophenotype for chronic lymphocytic leukemia (CLL) is CD19(+), restricted dim surface expression of kappa or lambda light chain, CD5(+), CD23(+), dim CD20(+), negative FMC7, and negative CD79b. However, the necessity of assaying for all 3 pan B-cell markers (CD20, FMC7, and CD79b) by flow cytometry has not been definitively documented for CLL. METHODS: Qualitative patterns and semi-quantitative assessment of staining intensity for CD20, FMC7 and CD79b were performed in 70 cases with a current or prior diagnosis of CLL or CLL with increased prolymphocytes leukemia (CLL/PL). The concurrent morphology in 66 of 70 specimens was classified as typical CLL in 53 cases, CLL/PL in 10 cases, and large cell lymphoma in 3 cases. RESULTS: Forty percent of the cases varied from the characteristic immunophenotype by having moderate or bright staining of CD20 (36{\%}), FMC7 (7{\%}), and/or CD79b (18{\%}). Discrepant qualitative staining patterns were found between FMC7 and CD20 (21{\%}), CD20 and CD79b (15{\%}), and CD79b and FMC7 (10{\%}). Semiquantitative measurement of staining intensity showed little correlation between CD79b and CD20 or FMC7. Moderate correlation was seen between CD20 and FMC7. No correlation was observed between morphology and intensity of marker expression. CONCLUSIONS: Variable patterns and intensity of staining were seen for FMC7, CD20, and CD79b in this cohort of CLL samples. Dim or negative staining was most consistently seen for FMC7 (93{\%} of specimens). Although FMC7 staining intensity was moderately correlated with CD20, CD79b intensity was poorly correlated with either CD20 or FMC7, and thus, may provide some independent information.",
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T1 - Pan B-cell markers are not redundant in analysis of chronic lymphocytic leukemia (CLL).

AU - Monaghan, Sara A.

AU - Peterson, LoAnn C.

AU - James, Cathy

AU - Marszalek, Laura

AU - Khoong, Adela

AU - Bachta, Dina J.

AU - Karpus, William J.

AU - Goolsby, Charles L.

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Y1 - 2003/11

N2 - BACKGROUND: The classic immunophenotype for chronic lymphocytic leukemia (CLL) is CD19(+), restricted dim surface expression of kappa or lambda light chain, CD5(+), CD23(+), dim CD20(+), negative FMC7, and negative CD79b. However, the necessity of assaying for all 3 pan B-cell markers (CD20, FMC7, and CD79b) by flow cytometry has not been definitively documented for CLL. METHODS: Qualitative patterns and semi-quantitative assessment of staining intensity for CD20, FMC7 and CD79b were performed in 70 cases with a current or prior diagnosis of CLL or CLL with increased prolymphocytes leukemia (CLL/PL). The concurrent morphology in 66 of 70 specimens was classified as typical CLL in 53 cases, CLL/PL in 10 cases, and large cell lymphoma in 3 cases. RESULTS: Forty percent of the cases varied from the characteristic immunophenotype by having moderate or bright staining of CD20 (36%), FMC7 (7%), and/or CD79b (18%). Discrepant qualitative staining patterns were found between FMC7 and CD20 (21%), CD20 and CD79b (15%), and CD79b and FMC7 (10%). Semiquantitative measurement of staining intensity showed little correlation between CD79b and CD20 or FMC7. Moderate correlation was seen between CD20 and FMC7. No correlation was observed between morphology and intensity of marker expression. CONCLUSIONS: Variable patterns and intensity of staining were seen for FMC7, CD20, and CD79b in this cohort of CLL samples. Dim or negative staining was most consistently seen for FMC7 (93% of specimens). Although FMC7 staining intensity was moderately correlated with CD20, CD79b intensity was poorly correlated with either CD20 or FMC7, and thus, may provide some independent information.

AB - BACKGROUND: The classic immunophenotype for chronic lymphocytic leukemia (CLL) is CD19(+), restricted dim surface expression of kappa or lambda light chain, CD5(+), CD23(+), dim CD20(+), negative FMC7, and negative CD79b. However, the necessity of assaying for all 3 pan B-cell markers (CD20, FMC7, and CD79b) by flow cytometry has not been definitively documented for CLL. METHODS: Qualitative patterns and semi-quantitative assessment of staining intensity for CD20, FMC7 and CD79b were performed in 70 cases with a current or prior diagnosis of CLL or CLL with increased prolymphocytes leukemia (CLL/PL). The concurrent morphology in 66 of 70 specimens was classified as typical CLL in 53 cases, CLL/PL in 10 cases, and large cell lymphoma in 3 cases. RESULTS: Forty percent of the cases varied from the characteristic immunophenotype by having moderate or bright staining of CD20 (36%), FMC7 (7%), and/or CD79b (18%). Discrepant qualitative staining patterns were found between FMC7 and CD20 (21%), CD20 and CD79b (15%), and CD79b and FMC7 (10%). Semiquantitative measurement of staining intensity showed little correlation between CD79b and CD20 or FMC7. Moderate correlation was seen between CD20 and FMC7. No correlation was observed between morphology and intensity of marker expression. CONCLUSIONS: Variable patterns and intensity of staining were seen for FMC7, CD20, and CD79b in this cohort of CLL samples. Dim or negative staining was most consistently seen for FMC7 (93% of specimens). Although FMC7 staining intensity was moderately correlated with CD20, CD79b intensity was poorly correlated with either CD20 or FMC7, and thus, may provide some independent information.

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