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Ally F, Gajzer D, Fromm JR. A Review of the Flow Cytometric Findings in Classic Hodgkin Lymphoma, Nodular Lymphocyte Predominant Hodgkin Lymphoma and T Cell/Histiocyte-Rich Large B Cell Lymphoma. Clin Lab Med 2023; 43:427-444. [PMID: 37481321 DOI: 10.1016/j.cll.2023.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2023]
Abstract
Classic Hodgkin lymphoma, nodular lymphocyte predominant Hodgkin lymphoma, and T cell/histiocyte-rich large B cell lymphoma form a unique set of lymphomas with similar morphologic growth patterns (occasional neoplastic cells within a prominent cellular cell background) that are pathobiologically related. Distinguishing these entities has been historically difficult by flow cytometry; however, our laboratory has developed antibody-fluorochrome combinations capable of immunophenotyping these lymphomas. Additionally, characterization of the background reactive lymphocytes can aid in narrowing the differential diagnosis. This review summarizes the immunophenotypic features and insights of the neoplastic and reactive populations found in this unique group of lymphomas.
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Affiliation(s)
- Feras Ally
- Department of Laboratory Medicine and Pathology, University of Washington
| | - David Gajzer
- Department of Laboratory Medicine and Pathology, University of Washington
| | - Jonathan R Fromm
- Department of Laboratory Medicine and Pathology, University of Washington.
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2
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A new approach to the study of Hodgkin lymphoma by flow cytometry. Pathology 2023; 55:86-93. [PMID: 36137774 DOI: 10.1016/j.pathol.2022.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 06/28/2022] [Accepted: 07/03/2022] [Indexed: 01/11/2023]
Abstract
Hodgkin lymphoma (HL) appears to originate from germinal centre B cells but lacks expression of most B cell markers. In contrast to non-Hodgkin B lymphomas, HL is not routinely diagnosed using flow cytometry techniques, and diagnosis is mainly based on immunohistochemical and cytomorphological pathology studies. Hodgkin and Reed-Sternberg cells are large and fragile, making them difficult to study by flow cytometry. The aim of this study was to characterise the CD71 expression pattern on CD4+ T cells from HL patients and to design a simple flow cytometry algorithm to complement the histopathological diagnosis of HL. The present study suggests the utility of a conventional staining protocol with a simple panel of seven markers (CD15, CD30, CD4, CD8, CD71, CD3, and CD45) and a well-defined analysis strategy. The proposed algorithm uses the CD71 ratio (calculated as the percentage of CD71+ CD4+ T cells divided by the percentage of CD71+ CD45+ CD3- lymphocytes), with a cut-off of 0.5 to establish diagnosis groups as suggestive (≥0.5) or not suggestive (<0.5) of HL. In HL, CD71 expression is higher on CD4+ T lymphocytes than on non-T lymphocytes. In addition, the CD4+ T cell population is increased in HL patients, with no change in amounts of CD8+ T cells. Application of the CD71 ratio algorithm yielded a sensitivity of 82% and specificity of 87%, with 84.61% of patients correctly diagnosed. Although histopathology remains the gold standard for definitive HL diagnosis, the proposed flow cytometry method provides a rapid method to guide the study that would allow a more robust and integrated diagnosis. Moreover, the procedure is easily applicable in most clinical laboratories as it does not require state-of-the-art cytometers and uses standard reagents.
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Gru AA, Lim MS, Dogan A, Horwitz SM, Delabie J, Fu K, Peker D, Reddy VVB, Xu ML, Vij K, Slack GW, Miranda RN, Jagadeesh D, Lisano JM, Hsi ED, Torlakovic E. Best Practices in CD30 Immunohistochemistry Testing, Interpretation, and Reporting: An Expert Panel Consensus. Arch Pathol Lab Med 2023; 147:79-86. [PMID: 35472771 DOI: 10.5858/arpa.2021-0270-oa] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/24/2021] [Indexed: 12/31/2022]
Abstract
CONTEXT.— Although CD30 testing is an established tool in the diagnostic workup of lymphomas, it is also emerging as a predictive biomarker that informs treatment. The current definition of CD30 positivity by immunohistochemistry is descriptive and based on reactivity in lymphomas that are defined by their universal strong expression of CD30, rather than any established threshold. Challenges include inconsistencies with preanalytic variables, tissue processing, pathologist readout, and with the pathologist and oncologist interpretation of reported results. OBJECTIVE.— To develop and propose general best practice recommendations for reporting CD30 expression by immunohistochemistry in lymphoma biopsies to harmonize practices across institutions and facilitate assessment of its significance in clinical decision-making. DESIGN.— Following literature review and group discussion, the panel of 14 academic hematopathologists and 2 clinical/academic hematologists/oncologists divided into 3 working groups. Each working group was tasked with assessing CD30 testing by immunohistochemistry, CD30 expression readout, or CD30 expression interpretation. RESULTS.— Panel recommendations were reviewed and discussed. An online survey was conducted to confirm the consensus recommendations. CONCLUSIONS.— CD30 immunohistochemistry is required for all patients in whom classic Hodgkin lymphoma and any lymphoma within the spectrum of peripheral T-cell lymphoma are differential diagnostic considerations. The panel reinforced and summarized that immunohistochemistry is the preferred methodology and any degree of CD30 expression should be reported. For diagnostic purposes, the interpretation of CD30 expression should follow published guidelines. To inform therapeutic decisions, report estimated percent positive expression in tumor cells (or total cells where applicable) and record descriptively if nontumor cells are positive.
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Affiliation(s)
- Alejandro A Gru
- From the Department of Pathology, E. Couric Clinical Cancer Center, University of Virginia, Charlottesville (Gru)
| | - Megan S Lim
- The Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia (Lim)
| | - Ahmet Dogan
- The Department of Pathology and Laboratory Medicine (Dogan), Memorial Sloan Kettering Cancer Center, New York, New York
| | - Steven M Horwitz
- The Department of Medical Oncology (Horwitz), Memorial Sloan Kettering Cancer Center, New York, New York
| | - Jan Delabie
- The Department of Laboratory Medicine & Pathobiology, University Health Network, Toronto, Ontario, Canada (Delabie)
| | - Kai Fu
- The Department of Pathology, Roswell Park Cancer Institution, Buffalo, New York (Fu)
| | - Deniz Peker
- The Department of Pathology & Laboratory Medicine, Emory University, Atlanta, Georgia (Peker)
| | - Vishnu V B Reddy
- The Department of Pathology, University of Alabama Medical Center, Birmingham (Reddy)
| | - Mina L Xu
- The Department of Pathology, Yale School of Medicine, Yale University, New Haven, Connecticut (Xu)
| | - Kiran Vij
- The Departments of Internal Medicine and Pathology & Immunology, Washington University School of Medicine, St Louis, Missouri (Vij)
| | - Graham W Slack
- The Department of Pathology and Laboratory Medicine, British Columbia Cancer, Vancouver, British Columbia, Canada (Slack)
| | - Roberto N Miranda
- The Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston (Miranda)
| | - Deepa Jagadeesh
- The Department of Hematology and Medical Oncology, Cleveland Clinic, Cleveland, Ohio (Jagadeesh)
| | - Julie M Lisano
- Medical Affairs, Seagen Inc, Bothell, Washington (Lisano)
| | - Eric D Hsi
- The Department of Pathology, Wake Forest School of Medicine, Winston-Salem, North Carolina (Hsi)
| | - Emina Torlakovic
- The Department of Pathology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada (Torlakovic)
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Gao H, Cai F, Liu L, Shen H. Flow cytometry assessment of reactive T-cells distinguishes classic Hodgkin lymphoma from benign lymphadenopathy in children. J Clin Lab Anal 2022; 36:e24661. [PMID: 35989518 PMCID: PMC9550978 DOI: 10.1002/jcla.24661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/20/2022] [Accepted: 08/02/2022] [Indexed: 11/11/2022] Open
Abstract
Background Detection of classic Hodgkin lymphoma (cHL) neoplastic cells using flow cytometric immunophenotyping (FCI) remains limited. We hypothesized that characterization of the reactive infiltrates could assist in diagnosing cHL in children. Methods FCI using four‐color staining approaches was performed on 156 lymph node specimens with the following histopathologic diagnoses: cHL (25 cases), reactive lymphoid hyperplasia (RLH, 44 cases), and non‐Hodgkin lymphoma (87 cases). Results The overall concordance of FCI data with the histopathologic results of these cases was 81.4%. A reactive expansion of T‐cells with increased expression of CD45RO was present in the reactive infiltrate of cHL (CD45RO/CD3, 67.5%) and Epstein–Barr virus (EBV) infected RLH (62.7%) but not in EBV‐negative RLH (28.0%). The mean fluorescence intensity (MFI) of CD7 was higher for cHL and differed significantly from EBV‐positive RLH (138.5 vs. 63.8). A proposed diagnostic algorithm markedly elevated the overall concordance rate from 81.4% to 97.4%. Conclusions Immunophenotyping the reactive infiltrate of lymphoid tissue using flow cytometry is a reliable supplement to histopathology for the rapid diagnosis of pediatric cHL.
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Affiliation(s)
- Hui Gao
- Department of Clinical Laboratory, The Children's Hospital Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Fengqing Cai
- Department of Clinical Laboratory, The Children's Hospital Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Lei Liu
- Department of Pathology, The Children's Hospital Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Hongqiang Shen
- Department of Clinical Laboratory, The Children's Hospital Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
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Martig DS, Fromm JR. A comparison and review of the flow cytometric findings in classic Hodgkin lymphoma, nodular lymphocyte predominant Hodgkin lymphoma, T cell/histiocyte rich large B cell lymphoma, and primary mediastinal large B cell lymphoma. CYTOMETRY. PART B, CLINICAL CYTOMETRY 2022; 102:14-25. [PMID: 34878224 DOI: 10.1002/cyto.b.22045] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 06/13/2023]
Abstract
The "Hodgkin-like" lymphomas including classic Hodgkin lymphoma, nodular lymphocyte predominant Hodgkin lymphoma, T cell/histiocyte rich large B cell lymphoma, and primary mediastinal large B cell lymphoma have been shown to be pathobiologically related. With the exception of primary mediastinal large B cell lymphoma, these lymphomas have similar morphologic growth patterns with occasional neoplastic cells within a prominent reactive cell background. Historically, distinguishing these entities was difficult by flow cytometry; however, over the past 15 years, our laboratory has developed antibody-fluorochrome combinations capable of accurately distinguishing these entities by their immunoprofile. Additionally, an algorithmic approach based on characterization of the background reactive B-cell and T-cell populations can aid in narrowing the differential diagnosis. This review summarizes both the morphologic and immunophenotypic features and the current flow cytometric insights of the neoplastic and reactive populations found in this unique subset of lymphomas.
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Affiliation(s)
- Daniel S Martig
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Jonathan R Fromm
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
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Simonson PD, Wu Y, Wu D, Fromm JR, Lee AY. De Novo Identification and Visualization of Important Cell Populations for Classic Hodgkin Lymphoma Using Flow Cytometry and Machine Learning. Am J Clin Pathol 2021; 156:1092-1102. [PMID: 34175918 PMCID: PMC8573674 DOI: 10.1093/ajcp/aqab076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Automated classification of flow cytometry data has the potential to reduce errors and accelerate flow cytometry interpretation. We desired a machine learning approach that is accurate, is intuitively easy to understand, and highlights the cells that are most important in the algorithm's prediction for a given case. METHODS We developed an ensemble of convolutional neural networks for classification and visualization of impactful cell populations in detecting classic Hodgkin lymphoma using two-dimensional (2D) histograms. Data from 977 and 245 clinical flow cytometry cases were used for training and testing, respectively. Seventy-eight nongated 2D histograms were created per flow cytometry file. Shapley additive explanation (SHAP) values were calculated to determine the most impactful 2D histograms and regions within histograms. SHAP values from all 78 histograms were then projected back to the original cell data for gating and visualization using standard flow cytometry software. RESULTS The algorithm achieved 67.7% recall (sensitivity), 82.4% precision, and 0.92 area under the receiver operating characteristic. Visualization of the important cell populations for individual predictions demonstrated correlations with known biology. CONCLUSIONS The method presented enables model explainability while highlighting important cell populations in individual flow cytometry specimens, with potential applications in both diagnosis and discovery of previously overlooked key cell populations.
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Affiliation(s)
- Paul D Simonson
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Yue Wu
- Department of Ophthalmology, University of Washington, Seattle, WA, USA
| | - David Wu
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Jonathan R Fromm
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Aaron Y Lee
- Department of Ophthalmology, University of Washington, Seattle, WA, USA
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Chan A, Scarpa Carniello JV, Gao Q, Sigler A, Baik J, Roshal M, Lin O. Role of Flow Cytometric Immunophenotyping for Classic Hodgkin Lymphoma in Small Biopsy and Cytology Specimens. Arch Pathol Lab Med 2021; 146:462-468. [PMID: 34293084 DOI: 10.5858/arpa.2020-0795-oa] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2021] [Indexed: 11/06/2022]
Abstract
CONTEXT.— The diagnosis of classic Hodgkin lymphoma (CHL) traditionally requires surgical tissue biopsy because of the paucity of diagnostic Hodgkin and Reed-Sternberg cells. Diagnosis can be challenging in small core needle and cytologic biopsies, which are increasingly used because of reduced costs and minimal invasiveness. Flow cytometric (FC) identification of Hodgkin and Reed-Sternberg cells is possible, but FC test efficacy is not well studied outside of validation settings, especially in small specimens. OBJECTIVE.— To assess the testing efficacy of FC performed on small biopsy and cytology specimens for the diagnosis of CHL. DESIGN.— We reviewed 131 patients with CHL and 459 patients without CHL during a 3-year period who underwent a small biopsy procedure, including core biopsy and/or cytology evaluation, with concurrent routine clinical FC testing for CHL, assessing performance of FC in small specimens. RESULTS.— Evaluating testing efficacy, sensitivity was 95.4% and specificity was 98.2%, whereas positive and negative predictive values were 92.2% and 99.0%, respectively. Although there were more false-positive results than compared with published validation studies, expert review identified distinct diagnostic pitfalls; awareness of these may improve testing efficacy. CONCLUSIONS.— Although FC diagnosis of CHL was historically considered unfeasible, our findings in a real-world clinical setting suggest that FC adds diagnostic value to small biopsy evaluation, reducing time to treatment, costs, and invasive excisional procedures.
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Affiliation(s)
- Alexander Chan
- From the Hematopathology (Chan, Gao, Sigler, Baik, Roshal, Lin), Memorial Sloan Kettering Cancer Center, New York, New York
| | - Jose Victor Scarpa Carniello
- Cytopathology (Scarpa Carniello, Lin) Services, Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Qi Gao
- From the Hematopathology (Chan, Gao, Sigler, Baik, Roshal, Lin), Memorial Sloan Kettering Cancer Center, New York, New York
| | - Allison Sigler
- From the Hematopathology (Chan, Gao, Sigler, Baik, Roshal, Lin), Memorial Sloan Kettering Cancer Center, New York, New York
| | - Jeeyeon Baik
- From the Hematopathology (Chan, Gao, Sigler, Baik, Roshal, Lin), Memorial Sloan Kettering Cancer Center, New York, New York
| | - Mikhail Roshal
- From the Hematopathology (Chan, Gao, Sigler, Baik, Roshal, Lin), Memorial Sloan Kettering Cancer Center, New York, New York.,Roshal and Lin contributed equally as senior authors
| | - Oscar Lin
- From the Hematopathology (Chan, Gao, Sigler, Baik, Roshal, Lin), Memorial Sloan Kettering Cancer Center, New York, New York.,Cytopathology (Scarpa Carniello, Lin) Services, Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York.,Roshal and Lin contributed equally as senior authors
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8
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Glynn E, Fromm JR. Immunophenotypic Characterization and Purification of Neoplastic Cells from Lymph Nodes Involved by T-Cell/Histiocyte-rich Large B-cell Lymphoma by Flow Cytometry and Flow Cytometric Cell Sorting. CYTOMETRY PART B-CLINICAL CYTOMETRY 2019; 98:88-98. [PMID: 31254446 DOI: 10.1002/cyto.b.21834] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 05/26/2019] [Accepted: 06/11/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND T-cell/histiocyte rich large B-cell lymphoma (THRLBCL) is B-cell lymphoma in which rare neoplastic cells are embedded in a reactive infiltrate. We describe the first characterization of the neoplastic cells by flow cytometry (FC). METHODS Using FC, we immunophenotyped the neoplastic cells of 11 cases of THRLBCL and 11 cases of DLBCL, NOS (controls). Neoplastic THRLBCL cells were also purified by flow cytometric cell sorting (FCCS). RESULTS A neoplastic THRLBCL population was detected by FC in 9 of 11 cases (82%). Neoplastic THRLBCL cells demonstrated an aberrant germinal center B-cell immunophenotype (bright CD20, bright CD40; positive for Bcl-6 and CD75; weakly positive for CD32; negative for IgH). With regard to adhesion molecules, CD54 was overexpressed, CD58 expression varied between cases, and CD50 expression was intermediate. Evaluation of immunomodulatory receptors demonstrated that PD-L2 was weakly expressed and PD-L1 was variably expressed. Finally, FCCS of two cases showed large multi-lobated cells with morphology consistent with neoplastic cells of THRLBCL. CONCLUSIONS The immunophenotype identified and the morphology of the FCCS purified cells confirms the FC defined populations are neoplastic cells from THRLBCL. While the cohort is small, neoplastic THRLBCL cells lack surface immunoglobulins. CD40, CD50, and CD54 were overexpressed in THRLBCL relative to DLBCL, NOS, perhaps contributing to the predominance of T cells in THRLBCL. Expression of CD32, PD-L1, and PD-L2 may be useful in distinguishing THRLBCL and NLPHL. Finally, the FC assays will be useful for purifying neoplastic cells of THRLBCL and for diagnostic immunophenotyping of THRLBCL. © 2019 International Clinical Cytometry Society.
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Affiliation(s)
- Emily Glynn
- Department of Laboratory Medicine, University of Washington, Seattle, Washington
| | - Jonathan R Fromm
- Department of Laboratory Medicine, University of Washington, Seattle, Washington
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9
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Abstract
Multiparametric flow cytometry is a powerful diagnostic tool that permits rapid assessment of cellular antigen expression to quickly provide immunophenotypic information suitable for disease classification. This chapter describes a general approach for the identification of abnormal lymphoid populations by flow cytometry, including B, T, NK, and Hodgkin lymphoma cells suitable for the clinical and research environment. Knowledge of the common patterns of antigen expression of normal lymphoid cells is critical to permit identification of abnormal populations at disease presentation and for minimal residual disease assessment. We highlight an overview of procedures for processing and immunophenotyping non-Hodgkin B- and T-cell lymphomas and also describe our strategy for the sensitive and specific diagnosis of classical Hodgkin lymphoma and nodular lymphocyte predominant Hodgkin lymphoma.
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Affiliation(s)
- Emily Glynn
- Department of Laboratory Medicine, University of Washington, Seattle, WA, USA
| | - Lori Soma
- Department of Laboratory Medicine, University of Washington, Seattle, WA, USA
| | - David Wu
- Department of Laboratory Medicine, University of Washington, Seattle, WA, USA
| | - Brent L Wood
- Department of Laboratory Medicine, University of Washington, Seattle, WA, USA
| | - Jonathan R Fromm
- Department of Laboratory Medicine, University of Washington Medical Center, Seattle, WA, USA.
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10
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Grewal RK, Chetty M, Abayomi EA, Tomuleasa C, Fromm JR. Use of flow cytometry in the phenotypic diagnosis of hodgkin's lymphoma. CYTOMETRY PART B-CLINICAL CYTOMETRY 2018; 96:116-127. [PMID: 30350336 DOI: 10.1002/cyto.b.21724] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/18/2018] [Accepted: 06/26/2018] [Indexed: 12/22/2022]
Abstract
Hodgkin's lymphoma (HL) has a unique immunophenotype derived from immunohistochemistry (positive for CD15, CD30, and Pax-5; negative for CD3, CD20 in most cases, and CD45). The knowledge gained over recent years enables better diagnosis, prognosis, and treatment of HL. Flow cytometry as a tool for the diagnosis of classic HL has not been useful in the past due to the difficulty in isolating Reed-Sternberg cells as they are admixed in a rich inflammatory background which consists mainly of T cells, B cells, eosinophils, histiocytes, and plasma cells. However, in the recent past, several studies have tried to identify Reed-Sternberg cells using flow cytometry on fine needle aspiration or tissue biopsy of lymph nodes to confirm or supplement immunohistochemistry staining in diagnosis. Newer and more sensitive tools such as flow cytometry can be used for diagnosis, technology that may have been difficult in the past for diagnosis of this lymphoma subtype. Using flow cytometry, diagnosis is faster and could lead to point-of-care technology especially where we have typical immunophenotype signatures. © 2018 International Clinical Cytometry Society.
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Affiliation(s)
- Ravnit-Kaur Grewal
- MBCHB South African National Bioinformatics Institute, University of the Western Cape, Bellville, South Africa
| | - Manogari Chetty
- Department of Oral and Molecular Biology, Faculty of Dentistry, University of the Western Cape, Cape Town, South Africa
| | | | - Ciprian Tomuleasa
- Department of Hematology/Research Center for Functional Genomics and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy-Ion Chiricuta Oncology Institute, Cluj Napoca, Romania
| | - Jonathan R Fromm
- Department of Laboratory Medicine, University of Washington, Seattle, Washington
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11
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Fromm JR, Thomas A, Wood BL. Characterization and Purification of Neoplastic Cells of Nodular Lymphocyte Predominant Hodgkin Lymphoma from Lymph Nodes by Flow Cytometry and Flow Cytometric Cell Sorting. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 187:304-317. [PMID: 27998726 DOI: 10.1016/j.ajpath.2016.10.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 09/16/2016] [Accepted: 10/18/2016] [Indexed: 11/28/2022]
Abstract
We report the flow cytometric (FC) identification and characterization of lymphocyte predominant (LP) cells from tissues involved by nodular lymphocyte predominant Hodgkin lymphoma (NLPHL). First, we immunophenotyped the NLPHL cell line (DEV) confirming a germinal center immunophenotype, lack of expression of CD32 and CD58, and expression of CD54. Nineteen of 26 lymph nodes involved by NLPHL demonstrated a population with an LP immunophenotype (73%), which included expression of germinal center markers (CD75/Bcl-6-positive, CD32-weak/negative without CD10), a B-cell immunophenotype (CD19/CD20/CD40+), IgD and/or IgM expression (67%), and lack of programmed death-ligand 1/ligand 2. The LP cells demonstrated an adhesion macromolecule expression pattern distinct from Hodgkin and Reed-Sternberg cells of classical Hodgkin lymphoma (CHL) (uniform CD50 and variable CD58 for NLPHL; minimal CD50, bright CD58 expression for CHL). A two-tube consensus assay identified LP cells in all seven NLPHL cases examined and only one non-NLPHL case (94 cases evaluated). Finally, FC cell sorting studies confirm that FC-defined populations have an LP cytomorphology. Taken together, these findings demonstrate a two-tube consensus assay can be used to immunophenotype NLHPL with high specificity and sensitivity and rapidly purify LP cells for genetic studies. This study also confirms aneuploidy in LP cells, provides antigens that may be helpful in distinguishing NLPHL from CHL, and suggests that T cells interact less avidly with LP cells than with Hodgkin and Reed-Sternberg cells.
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Affiliation(s)
- Jonathan R Fromm
- Department of Laboratory Medicine, University of Washington, Seattle, Washington.
| | | | - Brent L Wood
- Department of Laboratory Medicine, University of Washington, Seattle, Washington
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12
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Ahmad IN, Assad S, Rahman M, Ghazanfar H. Flow Cytometric Analysis: Four-Year Experience in a Tertiary Care Centre of Pakistan. Cureus 2016; 8:e764. [PMID: 27725920 PMCID: PMC5045332 DOI: 10.7759/cureus.764] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Purpose: This study summarizes a four-year experience from the analysis of hematolymphoid malignancies in Pakistani population using a database of six-colored flow cytometry. Methods: A cross-sectional survey of 323 specimens of hematolymphoid malignancies using six-colored flow cytometry (FC) was carried out in Shifa International Hospital, Islamabad, Pakistan from June 2012 to June 2016. The criterion for specimen adequacy was that the cases have abnormal populations by FC, and the specimen age (time from biopsy to being examined by the six-color FC tube) of three days or less was to be included in the study. Clinical follow-up of greater than six months was required for a negative flow cytometric study without a subsequent biopsy. Data analysis was done using Statistical Package for the Social Sciences (SPSS) version 21. One-way analysis of variance (ANOVA) was used to compare diagnosis with some antibodies used. Results: The number of specimen within certain age groups included were: 0-15 years; 111 (34.3%), 16-30 years; 65 (20.12%), 31-45 years; 47 (14.5%), 46-60 years; 46 (14.2%) and ≥ 60 years; 54 (16.7%). Hematological malignancies were documented in descending order of sequence with B-cell acute lymphoblastic leukemia (27.9%), acute myeloid leukemia (26.3%), chronic lymphocytic leukemia (13.3%), T cell acute lymphoblastic leukemia (7.7%), non-Hodgkin's lymphomas (5%), hairy cell leukemia (1.9%), chronic myeloid leukemia (0.3%), paroxysmal nocturnal hemoglobinuria (0.6%) and plasma cell dyscrasias (0.6%). The mean number of antibodies used were 12.68 ± 2.97. One-way ANOVA was used to compare diagnosis with some antibodies used. Statistical significance was found between diagnosis and number of antibodies used (F= 5.23 p<0.001). Conclusion: B cell acute lymphoblastic leukemia is most commonly diagnosed at tertiary care units in Pakistan using six-colored flow cytometry. Adoption of these complicated techniques has reinforced the need for optimization and further enhancement of flow cytometric procedures.
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Affiliation(s)
- Imran N Ahmad
- Shifa International Hospital, Shifa College Of Medicine, Islamabad, Pakistan
| | - Salman Assad
- Department of Neurology & Neurosurgery, Shifa Tameer-e-Millat University, Islamabad, Pakistan
| | | | - Haider Ghazanfar
- Department of Pathology, Shifa College Of Medicine, Islamabad, Pakistan
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Domínguez-Muñoz MÁ, Morales-Camacho RM, Prats-Martín C, Ávila R, Vargas MT, Burillo S, Bernal R, Borrero JJ. Unusual co-occurrence of Hodgkin lymphoma and hemophagocytic lymphohistiocytosis in a bone marrow aspirate. Ann Hematol 2016; 95:1019-21. [PMID: 27021302 DOI: 10.1007/s00277-016-2647-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 03/15/2016] [Indexed: 10/22/2022]
Affiliation(s)
- M Ángeles Domínguez-Muñoz
- UGC de Hematología. Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla (IBIS)/CSIC/Universidad de Sevilla, Avda. Manuel Siurot sn, CP 41013, Sevilla, Spain.
| | - Rosario M Morales-Camacho
- UGC de Hematología. Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla (IBIS)/CSIC/Universidad de Sevilla, Avda. Manuel Siurot sn, CP 41013, Sevilla, Spain
| | - Concepción Prats-Martín
- UGC de Hematología. Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla (IBIS)/CSIC/Universidad de Sevilla, Avda. Manuel Siurot sn, CP 41013, Sevilla, Spain
| | - Rainiero Ávila
- UGC de Anatomía Patológica. Hospital Universitario Virgen del Rocío, Sevilla, Spain
| | - María Teresa Vargas
- UGC de Hematología. Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla (IBIS)/CSIC/Universidad de Sevilla, Avda. Manuel Siurot sn, CP 41013, Sevilla, Spain
| | - Sergio Burillo
- Servicio de Inmunología. Hospital Universitario Virgen del Rocío, Sevilla, Spain
| | - Ricardo Bernal
- UGC de Hematología. Hospital Universitario Virgen del Rocío, Instituto de Biomedicina de Sevilla (IBIS)/CSIC/Universidad de Sevilla, Avda. Manuel Siurot sn, CP 41013, Sevilla, Spain
| | - Juan José Borrero
- UGC de Anatomía Patológica. Hospital Universitario Virgen del Rocío, Sevilla, Spain
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14
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Ng DP, Wu D, Wood BL, Fromm JR. Computer-aided detection of rare tumor populations in flow cytometry: an example with classic Hodgkin lymphoma. Am J Clin Pathol 2015; 144:517-24. [PMID: 26276783 DOI: 10.1309/ajcpy8e2lyhcgufp] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVES Diagnosing classical Hodgkin lymphoma (cHL) by flow cytometry (FC) relies on an observer gating rare populations of Hodgkin/Reed Sternberg (HRS) cells. Here, we apply machine-learning methods to aid in the detection of rare tumor cell populations using data derived from clinical FC analysis of cHL as a model disease. METHODS FC data from 144 clinical cases using a nine-color FC reagent panel were analyzed using Python 2.7 and the "scikit-learn" module. RESULTS Seventy-eight 50 × 50 two-dimensional histograms were generated from routine FC data and a reciprocal power function applied to favor rare events. Data were classified by support vector machine (SVM), gradient boosting, and random forest classifiers. All three classifiers showed no statistical difference in performance, with 89%-92% accuracy on cross-validation. Nearly all classifiers misclassified the same set of cases, with more false-positive than false-negative cases. Dimensionality reduction by ensemble methods selected for data points in a CD5+/ CD40+/CD64- region. CONCLUSIONS All classifiers provide probabilistic confidences for each result, and diagnostic cutoffs can be chosen to minimize false negatives and serve as a screening tool. Computational exclusion of manually gated HRS cells had little impact on the overall performance of selected support vectors in SVM or dimensionality reduction, suggesting that features of the immune response in cHL may dictate the method accuracy. We hypothesize there are distinct inflammatory cells that suggest cHL.
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Affiliation(s)
- David P. Ng
- Department of Laboratory Medicine, University of Washington, Seattle
| | - David Wu
- Department of Laboratory Medicine, University of Washington, Seattle
| | - Brent L. Wood
- Department of Laboratory Medicine, University of Washington, Seattle
| | - Jonathan R. Fromm
- Department of Laboratory Medicine, University of Washington, Seattle
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15
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Melzer S, Zachariae S, Bocsi J, Engel C, Löffler M, Tárnok A. Reference intervals for leukocyte subsets in adults: Results from a population-based study using 10-color flow cytometry. CYTOMETRY PART B-CLINICAL CYTOMETRY 2015; 88:270-81. [DOI: 10.1002/cyto.b.21234] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 01/19/2015] [Accepted: 02/10/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Susanne Melzer
- LIFE; Leipzig Research Center for Civilization Diseases; Universität Leipzig; Philipp-Rosenthal-Straße 27 Leipzig D-04103 Germany
- Department of Pediatric Cardiology; Heart Center Leipzig GmbH, Universität Leipzig; Strümpellstr. 39 Leipzig D-04289 Germany
| | - Silke Zachariae
- LIFE; Leipzig Research Center for Civilization Diseases; Universität Leipzig; Philipp-Rosenthal-Straße 27 Leipzig D-04103 Germany
- Institute for Medical Informatics, Statistics and Epidemiology; Universität Leipzig; Härtelstraße 16-18 Leipzig D- 04107 Germany
| | - Jozsef Bocsi
- LIFE; Leipzig Research Center for Civilization Diseases; Universität Leipzig; Philipp-Rosenthal-Straße 27 Leipzig D-04103 Germany
- Department of Pediatric Cardiology; Heart Center Leipzig GmbH, Universität Leipzig; Strümpellstr. 39 Leipzig D-04289 Germany
| | - Christoph Engel
- LIFE; Leipzig Research Center for Civilization Diseases; Universität Leipzig; Philipp-Rosenthal-Straße 27 Leipzig D-04103 Germany
- Institute for Medical Informatics, Statistics and Epidemiology; Universität Leipzig; Härtelstraße 16-18 Leipzig D- 04107 Germany
| | - Markus Löffler
- LIFE; Leipzig Research Center for Civilization Diseases; Universität Leipzig; Philipp-Rosenthal-Straße 27 Leipzig D-04103 Germany
- Institute for Medical Informatics, Statistics and Epidemiology; Universität Leipzig; Härtelstraße 16-18 Leipzig D- 04107 Germany
| | - Attila Tárnok
- LIFE; Leipzig Research Center for Civilization Diseases; Universität Leipzig; Philipp-Rosenthal-Straße 27 Leipzig D-04103 Germany
- Department of Pediatric Cardiology; Heart Center Leipzig GmbH, Universität Leipzig; Strümpellstr. 39 Leipzig D-04289 Germany
- Translational Centre for Regenerative Medicine (TRM) Leipzig; Philipp-Rosenthal-Str. 55 Leipzig D-04103 Germany
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