1
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Panel Sequencing of Primary Cutaneous B-Cell Lymphoma. Cancers (Basel) 2022; 14:cancers14215274. [DOI: 10.3390/cancers14215274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/22/2022] [Accepted: 10/25/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Primary cutaneous follicular B-cell lymphoma (PCFBCL) represents an indolent subtype of Non-Hodgkin’s lymphomas, being clinically characterized by slowly growing tumors of the skin and common cutaneous relapses, while only exhibiting a low propensity for systemic dissemination or fatal outcome. Up to now, only few studies have investigated underlying molecular alterations of PCFBCL with respect to somatic mutations. Objectives: Our aim was to gain deeper insight into the pathogenesis of PCFBCL and to delineate discriminatory molecular features of this lymphoma subtype. Methods: We performed hybridization-based panel sequencing of 40 lymphoma-associated genes of 10 cases of well-characterized PCFBCL. In addition, we included two further ambiguous cases of atypical B-cell-rich lymphoid infiltrate/B-cell lymphoma of the skin for which definite subtype attribution had not been possible by routine investigations. Results: In 10 out of 12 analyzed cases, we identified genetic alterations within 15 of the selected 40 target genes. The most frequently detected alterations in PCFBCL affected the TNFRSF14, CREBBP, STAT6 and TP53 genes. Our analysis unrevealed novel mutations of the BCL2 gene in PCFBCL. All patients exhibited an indolent clinical course. Both the included arbitrary cases of atypical B-cell-rich cutaneous infiltrates showed somatic mutations within the FAS gene. As these mutations have previously been designated as subtype-specific recurrent alterations in primary cutaneous marginal zone lymphoma (PCMZL), we finally favored the diagnosis of PCMZL in these two cases based on these molecular findings. Conclusions: To conclude, our molecular data support that PCFBCL shows distinct somatic mutations which may aid to differentiate PCFBCL from pseudo-lymphoma as well as from other indolent and aggressive cutaneous B-cell lymphomas. While the detected genetic alterations of PCFBCL did not turn out to harbor any prognostic value in our cohort, our molecular data may add adjunctive discriminatory features for diagnostic purposes on a molecular level.
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Cell-of-origin classification using the Hans and Lymph2Cx algorithms in primary cutaneous large B-cell lymphomas. Virchows Arch 2022; 480:667-675. [PMID: 35028710 PMCID: PMC8990933 DOI: 10.1007/s00428-021-03265-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 12/15/2021] [Accepted: 12/28/2021] [Indexed: 12/23/2022]
Abstract
Primary cutaneous diffuse large B-cell lymphoma, leg type (PCDLBCL-LT) and primary cutaneous follicle center lymphoma with a diffuse population of large cells (PCFCL-LC) are both primary cutaneous B-cell lymphomas with large-cell morphology (CLBCL) but with different clinical characteristics and behavior. In systemic diffuse large B-cell lymphoma, not otherwise specified (DLBCL-NOS), gene-expression profiling (GEP) revealed two molecular subgroups based on their cell-of-origin (COO) with prognostic significance: the germinal center B-cell-like (GCB) subtype and the activated B-cell-like (ABC) subtype. This study investigated whether COO classification is a useful tool for classification of CLBCL. For this retrospective study, 51 patients with PCDLBCL-LT and 15 patients with PCFCL-LC were analyzed for their COO according to the immunohistochemistry-based Hans algorithm and the NanoString GEP-based Lymph2Cx algorithm. In PCFCL-LC, all cases (100%) classified as GCB by both Hans and Lymph2Cx. In contrast, COO classification in PCDLBCL-LT was heterogeneous. Using Hans, 75% of the PCDLBCL-LT patients classified as non-GCB and 25% as GCB, while Lymph2Cx classified only 18% as ABC, 43% as unclassified/intermediate, and 39% as GCB. These COO subgroups did not differ in the expression of BCL2 and IgM, mutations in MYD88 and/or CD79B, loss of CDKN2A, or survival. In conclusion, PCFCL-LC uniformly classified as GCB, while PCDLBCL-LT classified along the COO spectrum of DLBCL-NOS using the Hans and Lymph2Cx algorithms. In contrast to DLBCL-NOS, the clinical relevance of COO classification in CLBCL using these algorithms has limitations and cannot be used as an alternative for the current multiparameter approach in differentiation of PCDLBCL-LT and PCFCL-LC.
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3
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Oschlies I, Wehkamp U. Cutaneous B cell lymphomas: standards in diagnostic and clinical work‐up. Hints, pitfalls and recent advances. Histopathology 2021; 80:184-195. [DOI: 10.1111/his.14556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 08/28/2021] [Accepted: 08/30/2021] [Indexed: 12/15/2022]
Affiliation(s)
- Ilske Oschlies
- Department of Pathology, Hematopathology and Lymph node Registry University Hospitals Schleswig‐Holstein Christian‐Albrecht‐University Kiel Germany
| | - Ulrike Wehkamp
- Department of Dermatology and Allergology University Hospitals Schleswig‐Holstein Christian‐Albrecht‐University Kiel Germany
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Kelley JT, Brown NA, Hristov AC, Bresler SC. Primary cutaneous follicle center lymphoma with extensive plasmacytic differentiation and t(14;18) in both the lymphoid and plasma cell components. J Cutan Pathol 2021; 48:969-974. [PMID: 33786907 DOI: 10.1111/cup.14020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/16/2021] [Accepted: 03/24/2021] [Indexed: 12/11/2022]
Abstract
Primary cutaneous follicle center lymphoma (PCFCL) is the most common cutaneous B-cell lymphoma. The typical immunophenotype includes expression of both CD20 and BCL6, with the majority of cases lacking expression of CD10, BCL2, and the characteristic t(14;18)/IGH-BCL2 rearrangement seen in systemic follicular lymphoma (FL). Plasmacytic differentiation (PD) is an uncommon finding in both systemic and cutaneous FLs and presents a diagnostic challenge when present, leading to the potential for misdiagnosis as marginal zone lymphoma (MZL). Limited reports have described light chain restriction in the plasma cell component of FLs with PD, and rare cases of PCFCL with PD have been described. While the IGH-BCL2 translocation has been identified in a subset of FLs with PD, the presence of the BCL2 translocation in monotypic plasma cells of PCFCL has not been previously described to our knowledge. Here, we report a case of PCFCL with extensive PD in a 77-year-old woman that was favored to represent primary cutaneous MZL on an initial punch biopsy. Excisional biopsy, however, revealed that the atypical lymphocytes expressed CD10, BCL6, and BCL2, while the plasma cell component demonstrated light-chain lambda restriction. FISH studies showed the presence of an IGH-BCL2 translocation in both the lymphocytic and plasmacytic components.
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Affiliation(s)
- Justin T Kelley
- Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Noah A Brown
- Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Alexandra C Hristov
- Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA.,Department of Dermatology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Scott C Bresler
- Department of Pathology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA.,Department of Dermatology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
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5
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Hristov AC, Tejasvi T, Wilcox RA. Cutaneous B-cell lymphomas: 2021 update on diagnosis, risk-stratification, and management. Am J Hematol 2020; 95:1209-1213. [PMID: 32815650 DOI: 10.1002/ajh.25970] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 08/15/2020] [Indexed: 11/12/2022]
Abstract
DISEASE OVERVIEW Approximately one-fourth of primary cutaneous lymphomas are B-cell derived and are generally classified into three distinct subgroups: primary cutaneous follicle center lymphoma (PCFCL), primary cutaneous marginal zone lymphoma (PCMZL), and primary cutaneous diffuse large B-cell lymphoma, leg type (PCDLBCL, LT). DIAGNOSIS Diagnosis and disease classification is based on histopathologic review and immunohistochemical staining of an appropriate skin biopsy. Pathologic review and an appropriate staging evaluation are necessary to distinguish primary cutaneous B-cell lymphomas from systemic B-cell lymphomas with secondary skin involvement. RISK-STRATIFICATION Disease histopathology remains the most important prognostic determinant in primary cutaneous B-cell lymphomas. Both PCFCL and PCMZL are indolent lymphomas that infrequently disseminate to extracutaneous sites and are associated with 5-year survival rates that exceed 95%. In contrast, PCDLBCL, LT is an aggressive lymphoma with an inferior prognosis. RISK-ADAPTED THERAPY Both PCFCL and PCMZL patients with solitary or relatively few skin lesions may be effectively managed with local radiation therapy. While single-agent rituximab may be employed for patients with more widespread skin involvement, multi-agent chemotherapy is rarely appropriate. In contrast, management of patients with PCDLBCL, LT is comparable to the management of patients with systemic DLBCL.
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Affiliation(s)
- Alexandra C Hristov
- Departments of Pathology and Dermatology, University of Michigan, Ann Arbor, Michigan, USA
| | - Trilokraj Tejasvi
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, USA
| | - Ryan A Wilcox
- Departments of Pathology and Dermatology, University of Michigan, Ann Arbor, Michigan, USA
- Division of Hematology/Oncology, University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
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6
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Vlahova L, Kempf W, Schön MP, Mitteldorf C. Primary cutaneous follicle centre lymphoma, spindle cell type, presenting with multicentre figurated erythema and complete remission after intralesional injections of ultra-low-dose Interferon alpha-2a. J Eur Acad Dermatol Venereol 2020; 35:e223-e225. [PMID: 32920866 DOI: 10.1111/jdv.16942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L Vlahova
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - W Kempf
- Kempf und Pfaltz Histologische Diagnostik, Zürich, Switzerland
| | - M P Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
| | - C Mitteldorf
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
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Dumont M, Battistella M, Ram-Wolff C, Bagot M, de Masson A. Diagnosis and Treatment of Primary Cutaneous B-Cell Lymphomas: State of the Art and Perspectives. Cancers (Basel) 2020; 12:cancers12061497. [PMID: 32521744 PMCID: PMC7352758 DOI: 10.3390/cancers12061497] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 05/30/2020] [Accepted: 06/04/2020] [Indexed: 12/12/2022] Open
Abstract
Primary cutaneous B-cell lymphomas are rare entities that develop primarily in the skin. They constitute a heterogeneous group that represents around a quarter of primary cutaneous lymphomas. The 2018 update of the World Health Organization-European Organization for Research and Treatment of Cancer (WHO-EORTC) classification differentiates primary cutaneous marginal zone lymphoma and primary cutaneous follicle center lymphoma with an indolent course from primary cutaneous diffuse large B-cell lymphoma, leg type with an aggressive behavior. The broad spectrum of clinical presentations and the disease course marked by frequent relapses are diagnostic and therapeutic challenges. The classification of these diseases has been refined in recent years, which allows to better define their immunopathogenesis and specific management. In the present article, we review the main clinico-biological characteristics and the current therapeutic options of these three main subsets. Based on the recent therapeutic advances in nodal B-cell lymphomas, we focus on the development of novel treatment options applicable to primary cutaneous B-cell lymphomas, including targeted therapies, combination treatments and immunotherapeutic approaches, and cover basic, translational and clinical aspects aiming to improve the treatment of cutaneous B-cell lymphomas.
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Affiliation(s)
- Maëlle Dumont
- Department of Dermatology, APHP, Saint-Louis Hospital, F-75010 Paris, France; (M.D.); (C.R.-W.); (A.d.M.)
- INSERM U976, Human Immunology, Pathophysiology and Immunotherapy, Institut de Recherche Saint-Louis, F-75010 Paris, France;
- Faculty of Medicine, Université de Paris (Paris University), F-75010 Paris, France
| | - Maxime Battistella
- INSERM U976, Human Immunology, Pathophysiology and Immunotherapy, Institut de Recherche Saint-Louis, F-75010 Paris, France;
- Faculty of Medicine, Université de Paris (Paris University), F-75010 Paris, France
- Pathology, APHP, Saint-Louis Hospital, F-75010 Paris, France
| | - Caroline Ram-Wolff
- Department of Dermatology, APHP, Saint-Louis Hospital, F-75010 Paris, France; (M.D.); (C.R.-W.); (A.d.M.)
| | - Martine Bagot
- Department of Dermatology, APHP, Saint-Louis Hospital, F-75010 Paris, France; (M.D.); (C.R.-W.); (A.d.M.)
- INSERM U976, Human Immunology, Pathophysiology and Immunotherapy, Institut de Recherche Saint-Louis, F-75010 Paris, France;
- Faculty of Medicine, Université de Paris (Paris University), F-75010 Paris, France
- Correspondence: ; Tel.: +33-1-53-72-20-93; Fax: +33-1-42-49-40-38
| | - Adèle de Masson
- Department of Dermatology, APHP, Saint-Louis Hospital, F-75010 Paris, France; (M.D.); (C.R.-W.); (A.d.M.)
- INSERM U976, Human Immunology, Pathophysiology and Immunotherapy, Institut de Recherche Saint-Louis, F-75010 Paris, France;
- Faculty of Medicine, Université de Paris (Paris University), F-75010 Paris, France
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Gru AA, McHargue C, Salavaggione AL. A Systematic Approach to the Cutaneous Lymphoid Infiltrates: A Clinical, Morphologic, and Immunophenotypic Evaluation. Arch Pathol Lab Med 2020; 143:958-979. [PMID: 31339758 DOI: 10.5858/arpa.2018-0294-ra] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CONTEXT.— The evaluation of cutaneous lymphoid infiltrates, both neoplastic and inflammatory, occurs very frequently in routine dermatopathologic examination and consultation practices. The "tough" cutaneous lymphoid infiltrate is feared by many pathologists; skin biopsies are relatively small, whereas diagnostic possibilities are relatively broad. It is true that cutaneous lymphomas can be difficult to diagnose and that in many circumstances multiple biopsies are required to establish a correct diagnostic interpretation. As a reminder, one should understand that low-grade cutaneous lymphomas are indolent disorders that usually linger for decades and that therapy does not result in disease cure. It is also important to remember that in most circumstances, those patients will die from another process that is completely unrelated to a diagnosis of skin lymphoma (even in the absence of specific therapy). OBJECTIVE.— To use a clinicopathologic, immunophenotypic, and molecular approach in the evaluation of common lymphocytic infiltrates. DATA SOURCES.— An in-depth analysis of updated literature in the field of cutaneous lymphomas was done, with particular emphasis on updated terminology from the most recent World Health Organization classification of skin and hematologic tumors. CONCLUSIONS.— A diagnosis of cutaneous lymphoid infiltrates can be adequately approached using a systematic scheme following the proposed ABCDE system. Overall, cutaneous T- and B-cell lymphomas are rare and "reactive" infiltrates are more common. Evaluation of lymphoid proliferations should start with a good sense of knowledge of the clinical presentation of the lesions, the clinical differential considerations, and a conscientious and appropriate use of immunohistochemistry and molecular tools.
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Affiliation(s)
- Alejandro A Gru
- From the Departments of Pathology (Drs Gru and Salavaggione) and Dermatology (Dr Gru), University of Virginia, Charlottesville; and the Department of Dermatology (Dr McHargue), Henry Ford Health System, Detroit, Michigan
| | - Chauncey McHargue
- From the Departments of Pathology (Drs Gru and Salavaggione) and Dermatology (Dr Gru), University of Virginia, Charlottesville; and the Department of Dermatology (Dr McHargue), Henry Ford Health System, Detroit, Michigan
| | - Andrea L Salavaggione
- From the Departments of Pathology (Drs Gru and Salavaggione) and Dermatology (Dr Gru), University of Virginia, Charlottesville; and the Department of Dermatology (Dr McHargue), Henry Ford Health System, Detroit, Michigan
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Oschlies I, King RL, Dotlic S, Montes-Moreno S, Ponzoni M, Traverse-Glehen A, Calaminici M, Ferry JA, Ott G, Goodlad JR. The clinico-pathological spectrum of primary cutaneous lymphoma other than mycosis fungoides/Sezary syndrome. Virchows Arch 2019; 476:683-699. [DOI: 10.1007/s00428-019-02713-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 10/28/2019] [Accepted: 11/01/2019] [Indexed: 12/30/2022]
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10
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Li L, Majerowski J, Sokumbi O. Cutaneous spindled follicle center cell lymphoma with abundant mucin: A diagnostic pitfall. J Cutan Pathol 2019; 47:394-397. [DOI: 10.1111/cup.13609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 10/25/2019] [Accepted: 10/27/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Lin Li
- Medical College of Wisconsin Milwaukee Wisconsin
| | | | - Olayemi Sokumbi
- Department of DermatologyMayo Clinic Jacksonville Florida
- Department of Laboratory Medicine & PathologyMayo Clinic Jacksonville Florida
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11
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[Hematological neoplasias as differential diagnoses of soft tissue tumors]. DER PATHOLOGE 2019; 40:412-421. [PMID: 30941488 DOI: 10.1007/s00292-019-0588-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Several hematological malignancies might morphologically present as differential diagnoses of sarcomas. OBJECTIVES To illustrate entities of hematological malignancies that might cause difficulties in differentiation from sarcomas and to introduce immunohistochemical and molecular tests that facilitate the diagnosis. MATERIAL AND METHODS Selective literature research ( http://www.ncbi.nlm.nih.gov ) was combined with the clinico-pathological experience of the authors. RESULTS In particular, hematologic malignancies with small blue round cell cytology, as well as lymphomas with anaplastic or spindle cell morphology, may mimic sarcomas. Identification of the correct diagnosis is usually possible by applying immunohistochemical and molecular analyses. Lymphomas without expression of CD45 and hematological neoplasias with expression of markers characteristic of sarcomas may cause difficulties in differential diagnosis. CONCLUSION Hematological malignancies should be kept in mind as differential diagnoses of sarcomas and should be excluded by immunohistochemical and molecular analyses according to morphology and the clinical picture.
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Wagner M, Hänsel R, Reinke S, Richter J, Altenbuchinger M, Braumann UD, Spang R, Löffler M, Klapper W. Automated macrophage counting in DLBCL tissue samples: a ROF filter based approach. Biol Proced Online 2019; 21:13. [PMID: 31303867 PMCID: PMC6600891 DOI: 10.1186/s12575-019-0098-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 05/08/2019] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND For analysis of the tumor microenvironment in diffuse large B-cell lymphoma (DLBCL) tissue samples, it is desirable to obtain information about counts and distribution of different macrophage subtypes. Until now, macrophage counts are mostly inferred from gene expression analysis of whole tissue sections, providing only indirect information. Direct analysis of immunohistochemically (IHC) fluorescence stained tissue samples is confronted with several difficulties, e.g. high variability of shape and size of target macrophages and strongly inhomogeneous intensity of staining. Consequently, application of commercial software is largely restricted to very rough analysis modes, and most macrophage counts are still obtained by manual counting in microarrays or high power fields, thus failing to represent the heterogeneity of tumor microenvironment adequately. METHODS We describe a Rudin-Osher-Fatemi (ROF) filter based segmentation approach for whole tissue samples, combining floating intensity thresholding and rule-based feature detection. Method is validated against manual counts and compared with two commercial software kits (Tissue Studio 64, Definiens AG, and Halo, Indica Labs) and a straightforward machine-learning approach in a set of 50 test images. Further, the novel method and both commercial packages are applied to a set of 44 whole tissue sections. Outputs are compared with gene expression data available for the same tissue samples. Finally, the ROF based method is applied to 44 expert-specified tumor subregions for testing selection and subsampling strategies. RESULTS Among all tested methods, the novel approach is best correlated with manual count (0.9297). Automated detection of evaluation subregions proved to be fully reliable. Comparison with gene expression data obtained for the same tissue samples reveals only moderate to low correlation levels. Subsampling within tumor subregions is possible with results almost identical to full sampling. Mean macrophage size in tumor subregions is 152.5±111.3 μm2. CONCLUSIONS ROF based approach is successfully applied to detection of IHC stained macrophages in DLBCL tissue samples. The method competes well with existing commercial software kits. In difference to them, it is fully automated, externally repeatable, independent on training data and completely documented. Comparison with gene expression data indicates that image morphometry constitutes an independent source of information about antibody-polarized macrophage occurence and distribution.
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Affiliation(s)
- Marcus Wagner
- Institute for Medical Informatics, Statistics and Epidemiology (IMISE), University of Leipzig, Härtelstr. 16–18, Leipzig, 04107 Germany
| | - René Hänsel
- Institute for Medical Informatics, Statistics and Epidemiology (IMISE), University of Leipzig, Härtelstr. 16–18, Leipzig, 04107 Germany
| | - Sarah Reinke
- Department of Pathology, Hematopathology Section and Lymph Node Registry, University of Kiel/University Hospital Schleswig-Holstein, Arnold-Heller-Str. 3, Haus 14, Kiel, 24105 Germany
| | - Julia Richter
- Department of Pathology, Hematopathology Section and Lymph Node Registry, University of Kiel/University Hospital Schleswig-Holstein, Arnold-Heller-Str. 3, Haus 14, Kiel, 24105 Germany
| | - Michael Altenbuchinger
- Institute of Functional Genomics, Statistical Bioinformatics, University of Regensburg, Am BioPark 9, Regensburg, 93053 Germany
| | - Ulf-Dietrich Braumann
- Faculty of Electrical Engineering and Information Technology, Leipzig University of Applied Sciences (HTWK), P. O. B. 30 11 66, Leipzig, 04251 Germany
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Perlickstr. 1, Leipzig, 04103 Germany
| | - Rainer Spang
- Institute of Functional Genomics, Statistical Bioinformatics, University of Regensburg, Am BioPark 9, Regensburg, 93053 Germany
| | - Markus Löffler
- Institute for Medical Informatics, Statistics and Epidemiology (IMISE), University of Leipzig, Härtelstr. 16–18, Leipzig, 04107 Germany
| | - Wolfram Klapper
- Department of Pathology, Hematopathology Section and Lymph Node Registry, University of Kiel/University Hospital Schleswig-Holstein, Arnold-Heller-Str. 3, Haus 14, Kiel, 24105 Germany
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Abstract
CONTEXT.— Primary cutaneous follicle center lymphoma is a low-grade B-cell lymphoma that is limited to the skin at diagnosis. It has a differential diagnosis that includes systemic/nodal follicular lymphoma secondarily involving the skin; primary cutaneous diffuse large B-cell lymphoma leg type; reactive lymphoid hyperplasia; and primary cutaneous marginal zone lymphoma. OBJECTIVE.— To review the clinical, morphologic, immunophenotypic, and genetic features of primary cutaneous follicle center lymphoma; its differential diagnosis; and the evidence that supports use of immunohistochemistry and genetic testing in the diagnosis and prognosis of this entity. DATA SOURCES.— Pertinent literature regarding cutaneous B-cell lymphomas is summarized and University of Michigan cases are used to highlight characteristics of primary cutaneous follicle center lymphoma. CONCLUSIONS.— Primary cutaneous follicle center lymphoma is a low-grade B-cell lymphoma with distinctive features, although some cases may have elements that overlap with other lymphomas, complicating interpretation.
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Affiliation(s)
| | | | - Alexandra C Hristov
- From the Department of Pathology, University of Michigan Medical Center, Ann Arbor (Drs Skala and A. C. Hristov); the Department of Internal Medicine, Section of Radiation Oncology, Wright Patterson Air Force Base (Dr B. Hristov); and the Department of Dermatology, University of Michigan Medical Center (Dr A. C. Hristov)
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