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Paillassa J, Maitre E, Belarbi Boudjerra N, Madani A, Benlakhal R, Matthes T, Van Den Neste E, Cailly L, Inchiappa L, Bekadja MA, Tomowiak C, Troussard X. Recommendations for the Management of Patients with Hairy-Cell Leukemia and Hairy-Cell Leukemia-like Disorders: A Work by French-Speaking Experts and French Innovative Leukemia Organization (FILO) Group. Cancers (Basel) 2024; 16:2185. [PMID: 38927891 PMCID: PMC11201647 DOI: 10.3390/cancers16122185] [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: 04/15/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/28/2024] Open
Abstract
INTRODUCTION Hairy-cell leukemia (HCL) is a rare B-cell chronic lymphoproliferative disorder (B-CLPD), whose favorable prognosis has changed with the use of purine nucleoside analogs (PNAs), such as cladribine (CDA) or pentostatin (P). However, some patients eventually relapse and over time HCL becomes resistant to chemotherapy. Many discoveries have been made in the pathophysiology of HCL during the last decade, especially in genomics, with the identification of the BRAFV600E mutation and cellular biology, including the importance of signaling pathways as well as tumor microenvironment. All of these new developments led to targeted treatments, especially BRAF inhibitors (BRAFis), MEK inhibitors (MEKis), Bruton's tyrosine kinase (BTK) inhibitors (BTKis) and recombinant anti-CD22 immunoconjugates. RESULTS The following major changes or additions were introduced in these updated guidelines: the clinical relevance of the changes in the classification of splenic B-cell lymphomas and leukemias; the increasingly important diagnostic role of BRAFV600E mutation; and the prognostic role of the immunoglobulin (IG) variable (V) heavy chain (H) (IGHV) mutational status and repertory. We also wish to insist on the specific involvement of bones, skin, brain and/or cerebrospinal fluid (CSF) of the disease at diagnosis or during the follow-up, the novel targeted drugs (BRAFi and MEKi) used for HCL treatment, and the increasing role of minimal residual disease (MRD) assessment. CONCLUSION Here we present recommendations for the diagnosis of HCL, treatment in first line and in relapsed/refractory patients as well as for HCL-like disorders including HCL variant (HCL-V)/splenic B-cell lymphomas/leukemias with prominent nucleoli (SBLPN) and splenic diffuse red pulp lymphoma (SDRPL).
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Affiliation(s)
- Jérôme Paillassa
- Service des Maladies du Sang, CHU d’Angers, 49000 Angers, France;
| | - Elsa Maitre
- Hématologie Biologique, Structure Fédérative D’oncogénétique Cyto-Moléculaire du CHU de Caen (SF-MOCAE), CHU de Caen, 14000 Caen, France;
- Unité MICAH, INSERM1245, Université Caen-Normandie, 14000 Caen, France
| | | | - Abdallah Madani
- Service d’Hématologie, CHU de Casablanca, Casablanca 20000, Morocco;
| | | | - Thomas Matthes
- Service d’Hématologie, Département d’Oncologie et Service de Pathologie Clinique, Département de Diagnostic, Hôpital Universitaire de Genève, 1205 Genève, Switzerland;
| | - Eric Van Den Neste
- Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, 1000 Brussels, Belgium;
| | - Laura Cailly
- Service d’Onco-Hématologie et de Thérapie Cellulaire, CHU de Poitiers, 86000 Poitiers, France; (L.C.)
| | - Luca Inchiappa
- Service d’Hématologie, Institut Paoli-Calmette, 13397 Marseille, France
| | | | - Cécile Tomowiak
- Service d’Onco-Hématologie et de Thérapie Cellulaire, CHU de Poitiers, 86000 Poitiers, France; (L.C.)
| | - Xavier Troussard
- Hématologie Biologique, Structure Fédérative D’oncogénétique Cyto-Moléculaire du CHU de Caen (SF-MOCAE), CHU de Caen, 14000 Caen, France;
- Hematologie CHU Caen Normandie, 14000 Caen, France
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Troussard X, Maître E, Paillassa J. Hairy cell leukemia 2024: Update on diagnosis, risk-stratification, and treatment-Annual updates in hematological malignancies. Am J Hematol 2024; 99:679-696. [PMID: 38440808 DOI: 10.1002/ajh.27240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/10/2024] [Accepted: 01/19/2024] [Indexed: 03/06/2024]
Abstract
DISEASE OVERVIEW Hairy cell leukemia (HCL) and HCL-like disorders, including HCL variant (HCL-V) and splenic diffuse red pulp lymphoma (SDRPL), are a very heterogenous group of mature lymphoid B-cell disorders characterized by the identification of hairy cells, a specific genetic profile, a different clinical course and the need for appropriate treatment. DIAGNOSIS Diagnosis of HCL is based on morphological evidence of hairy cells, an HCL immunologic score of 3 or 4 based on the CD11c, CD103, CD123, and CD25 expression, the trephine biopsy which makes it possible to specify the degree of tumoral bone marrow infiltration and the presence of BRAFV600E somatic mutation. RISK STRATIFICATION Progression of patients with HCL is based on a large splenomegaly, leukocytosis, a high number of hairy cells in the peripheral blood, and the immunoglobulin heavy chain variable region gene mutational status. VH4-34 positive HCL cases are associated with a poor prognosis, as well as HCL with TP53 mutations and HCL-V. TREATMENT Patients should be treated only if HCL is symptomatic. Chemotherapy with risk-adapted therapy purine analogs (PNAs) are indicated in first-line HCL patients. The use of chemo-immunotherapy combining cladribine (CDA) and rituximab (R) represents an increasingly used therapeutic approach. Management of relapsed/refractory disease is based on the use of BRAF inhibitors (BRAFi) plus R, MEK inhibitors (MEKi), recombinant immunoconjugates targeting CD22, Bruton tyrosine kinase inhibitors (BTKi), and Bcl-2 inhibitors (Bcl-2i). However, the optimal sequence of the different treatments remains to be determined.
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Affiliation(s)
| | - Elsa Maître
- Laboratoire Hématologie, CHU Côte de Nacre, Caen Cedex, France
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Chan A, Gao Q, Roshal M. 19-color, 21-Antigen Single Tube for Efficient Evaluation of B- and T-cell Neoplasms. Curr Protoc 2023; 3:e884. [PMID: 37725693 PMCID: PMC10516508 DOI: 10.1002/cpz1.884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Non-Hodgkin lymphoma (NHL) is a heterogeneous disease, encompassing a wide variety of individually distinct neoplastic entities of mature B-, T-, and NK-cells. While they constitute a broad category, they are the most common hematologic malignancies in the world. The distinction between different neoplastic entities requires a multi-modal approach, such as flow cytometric immunophenotyping, which can exclude a neoplastic proliferation and help narrow the differential diagnosis. This article describes a flow cytometric test developed at Memorial Sloan Kettering Cancer Center to assess B-, T-, and NK-cells in a single tube, 21-antibody, 19-color assay. The assay can identify most B- and T-cell NHLs with high specificity and sensitivity and significantly narrow the differential when a specific diagnosis cannot be made. The basic protocol provides a detailed operational procedure for sample processing, staining, and cytometric acquisition. The support protocol provides typical steps and caveats for data analysis in lymphoproliferative disorders and in discriminating a variety of specific disease entities from each other and normal lymphoid populations. © 2023 Wiley Periodicals LLC. Basic Protocol: Processing, staining, and cytometric analysis of samples for B- and T-cell assessment Support Protocol: Analysis and interpretation of the B- and T-cell lymphocyte assay.
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Affiliation(s)
- Alexander Chan
- Hematopathology service, Memorial Sloan Kettering Cancer Center, Department of Pathology and Laboratory Medicine, New York, New York
| | - Qi Gao
- Hematopathology service, Memorial Sloan Kettering Cancer Center, Department of Pathology and Laboratory Medicine, New York, New York
| | - Mikhail Roshal
- Hematopathology service, Memorial Sloan Kettering Cancer Center, Department of Pathology and Laboratory Medicine, New York, New York
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Mendez-Hernandez A, Moturi K, Hanson V, Andritsos LA. Hairy Cell Leukemia: Where Are We in 2023? Curr Oncol Rep 2023; 25:833-840. [PMID: 37097545 PMCID: PMC10126561 DOI: 10.1007/s11912-023-01419-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2023] [Indexed: 04/26/2023]
Abstract
PURPOSE OF REVIEW This article summarizes the current state of knowledge of hairy cell leukemia (HCL) regarding presentation, diagnosis, therapy, and monitoring, including perspectives on emergent therapies. RECENT FINDINGS Over the past decade, there has been enormous progress in the understanding of the biology of HCL which has led to the development of novel therapeutic strategies. The maturation of data regarding existing management strategies has also lent considerable insight into therapeutic outcomes and prognosis of patients treated with chemo- or chemoimmunotherapy. Purine nucleoside analogs remain the cornerstone of treatment, and the addition of rituximab has deepened and prolonged responses in the upfront and relapsed setting. Targeted therapies now have a more defined role in the management of HCL, with BRAF inhibitors now having a potential in the first-line setting in selected cases as well as in relapse. Next-generation sequencing for the identification of targetable mutations, evaluation of measurable residual disease, and risk stratification continue to be areas of active investigation. Recent advances in HCL have led to more effective therapeutics in the upfront and relapsed setting. Future efforts will focus on identifying patients with high-risk disease who require intensified regimens. Multicenter collaborations are the key to improving overall survival and quality of life in this rare disease.
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Affiliation(s)
- Andres Mendez-Hernandez
- Division of Hematology and Oncology, University of New Mexico Comprehensive Cancer Center, 1 University of New Mexico, 1201 Camino de Salud, NE Albuquerque, NM 87102 USA
| | - Krishna Moturi
- Division of Hematology and Oncology, University of New Mexico Comprehensive Cancer Center, 1 University of New Mexico, 1201 Camino de Salud, NE Albuquerque, NM 87102 USA
| | - Valeria Hanson
- Division of Internal Medicine, University of New Mexico School of Medicine, MSC08 4720 1 UNM, Albuquerque, NM 87131-0001 USA
| | - Leslie A. Andritsos
- Division of Hematology and Oncology, University of New Mexico Comprehensive Cancer Center, 1 University of New Mexico, 1201 Camino de Salud, NE Albuquerque, NM 87102 USA
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Cailly L, Gruchet C, Maitre E, Guidez S, Delwail V, Systchenko T, Moya N, Sabirou F, Levy A, Bobin A, Gardeney H, Nsiala L, Vonfeld M, Chacon A, Pichon A, Bouyer S, Baslé C, Dindinnaud E, Chomel J, Raimbault A, Borde‐Mougenot F, Troussard X, Tomowiak C. Hairy cell leukemia with isolated bone lesions. Clin Case Rep 2023; 11:e7343. [PMID: 37207087 PMCID: PMC10188895 DOI: 10.1002/ccr3.7343] [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: 01/01/2023] [Revised: 03/24/2023] [Accepted: 04/28/2023] [Indexed: 05/21/2023] Open
Abstract
Key Clinical Message 18F-FDG PET/CT has clinical relevance in HCL at diagnosis and for the follow-up of patients treated, especially in case of atypical presentations such as bone involvements (which are probably underestimated) and poor bone marrow infiltration. Abstract Bone lesions are rarely reported in Hairy Cell Leukemia (HCL). We report two BRAFV600E mutated HCL patients presented bone lesions at foreground, poor bone marrow involvement, and the important role 18F-FDG PET/CT played in their management. We discuss the crucial role that 18F-FDG PET/CT could play in HCL routine practice.
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Affiliation(s)
- Laura Cailly
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Cécile Gruchet
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Elsa Maitre
- Department of Hematology, CHU Cote de NacreUniversity HospitalCaenFrance
| | - Stephanie Guidez
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Vincent Delwail
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Thomas Systchenko
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Niels Moya
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Florence Sabirou
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Anthony Levy
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Arthur Bobin
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Hélène Gardeney
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Laly Nsiala
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Mathilde Vonfeld
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Aurélia Chacon
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Aurélien Pichon
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
| | - Sabrina Bouyer
- Department of Biology, CHU La MiletrieUniversity HospitalPoitiersFrance
| | - Caroline Baslé
- Department of Biology, CHU La MiletrieUniversity HospitalPoitiersFrance
| | - Elodie Dindinnaud
- Department of Biology, CHU La MiletrieUniversity HospitalPoitiersFrance
| | | | - Anna Raimbault
- Department of Biology, CHU La MiletrieUniversity HospitalPoitiersFrance
| | | | - Xavier Troussard
- Department of Hematology, CHU Cote de NacreUniversity HospitalCaenFrance
| | - Cécile Tomowiak
- Department of Hematology and Cellular Therapy, and INSERM CIC1402CHU La Miletrie, University HospitalPoitiersFrance
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Troussard X, Maître E, Cornet E. Hairy cell leukemia 2022: Update on diagnosis, risk-stratification, and treatment. Am J Hematol 2022; 97:226-236. [PMID: 34710243 DOI: 10.1002/ajh.26390] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 12/13/2022]
Abstract
DISEASE OVERVIEW Hairy cell leukemia (HCL) and HCL-like disorders, including HCL variant (HCL-V) and splenic diffuse red pulp lymphoma (SDRPL), are a very heterogeneous group of mature lymphoid B-cell disorders characterized by the identification of hairy cells, a specific genetic profile, a different clinical course, and the need for appropriate treatment. DIAGNOSIS Diagnosis of HCL is based on morphological evidence of hairy cells, an HCL immunologic score of 3 or 4 based on the CD11C, CD103, CD123, and CD25 expression, the trephine biopsy which makes it possible to specify the degree of tumoral medullary infiltration and the presence of BRAFV600E somatic mutation. RISK STRATIFICATION Progression of patients with HCL is based on a large splenomegaly, leukocytosis, a high number of hairy cells in the peripheral blood, and the immunoglobulin heavy chain variable region gene mutational status. VH4-34-positive HCL cases are associated with a poor prognosis. TREATMENT Patients should be treated only if HCL is symptomatic. Chemotherapy with risk adapted therapy purine analogs (PNAs) are indicated in first-line HCL patients. The use of chemo-immunotherapy combining PNAs and rituximab (R) represents an increasingly used therapeutic approach. Management of relapsed/refractory disease is based on the use of BRAF inhibitors (BRAFi) plus rituximab or MEK inhibitors (MEKi), recombinant immunoconjugates targeting CD22 or Bruton Tyrosine Kinase inhibitors (BTKi). However, the optimal sequence of the different treatments remains to be determined. The Bcl2-inhibitors (Bcl-2i) can play a major role in the future.
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Affiliation(s)
- Xavier Troussard
- Laboratoire Hématologie CHU Côte de Nacre Caen Cedex France
- Université Caen Normandie Caen Cedex France
| | - Elsa Maître
- Laboratoire Hématologie CHU Côte de Nacre Caen Cedex France
- Université Caen Normandie Caen Cedex France
| | - Edouard Cornet
- Laboratoire Hématologie CHU Côte de Nacre Caen Cedex France
- Université Caen Normandie Caen Cedex France
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Diagnosis and treatment of hairy cell leukemia as the COVID-19 pandemic continues. Blood Rev 2022; 51:100888. [PMID: 34535326 PMCID: PMC8418384 DOI: 10.1016/j.blre.2021.100888] [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: 07/07/2021] [Revised: 08/26/2021] [Accepted: 08/31/2021] [Indexed: 02/06/2023]
Abstract
Hairy cell leukemia (HCL) is an indolent B-cell malignancy, usually driven by the BRAF V600E mutation. For 30 years, untreated and relapsed HCL was successfully treated with purine analogs, but minimal residual disease (MRD) remained in most patients, eventually causing relapse. Repeated purine analogs achieve decreasing efficacy and increasing toxicity, particularly to normal T-cells. MRD-free complete remissions (CRs) are more common using rituximab with purine analogs in both 1st-line and relapsed settings. BRAF inhibitors and Ibrutinib can achieve remission, but due to persistence of MRD, must be used chronically to prevent relapse. BRAF inhibition combined with Rituximab can achieve high MRD-free CR rates. Anti-CD22 recombinant immunotoxin moxetumomab pasudotox is FDA-approved in the relapsed setting and is unique in achieving high MRD-free CR rates as a single-agent. Avoiding chemotherapy and rituximab may be important in ensuring both recovery from COVID-19 and successful COVID-19 vaccination, an area of continued investigation.
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Kohla S, Ibrahim FA, Aldapt MB, ELSabah H, Mohamed S, Youssef R. A Rare Case of Hairy Cell Leukemia with Unusual Loss of CD123 Associated with COVID-19 at the Time of Presentation. Case Rep Oncol 2020; 13:1430-1440. [PMID: 33442367 PMCID: PMC7772869 DOI: 10.1159/000512830] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 10/27/2020] [Indexed: 01/08/2023] Open
Abstract
Coronavirus disease 2019 (COVID-19) pandemic has been a serious threat and has been reported with different presentations and complications. Older age, along with comorbidities such as diabetes, hypertension, or cardiac disease, increases the risk factors for COVID-19 severity and death [N Engl J Med. 2020;382(18):1708–20 and Lancet Respir Med. 2020 05;8(5):475–81]. It is proposed that cancer patients have a significantly higher incidence of severe incidents including admission to the intensive care unit, the necessity for assisted ventilation, and even death after catching the virus compared with non-cancer patients [Lancet Oncol. 2020;21(3):335–7]. It is also described that cancer patients appear to be twice as likely to contract infection with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) [JAMA Oncol. 2020;6(7):1108–10]. Hairy cell leukemia (HCL) is a rare B-cell lymphoproliferative disorder, with patients typically presenting with cytopenias, marked splenomegaly in 80–90% of patients, circulating leukemia cells, bone marrow infiltration and the presence of BRAF V600E somatic mutation [Indian J Hematol Blood Transfus. 2014;30(Suppl 1):413–7]. Leukemic cells classically have central nuclei and abundant cytoplasm with hairy-like projections and express CD11c, CD25, CD103, and CD123 [Indian J Hematol Blood Transfus. 2014;30(Suppl 1):413–7]. Loss of CD123 in HCL has been rarely reported in the literature [Am J Hematol. 2019;94(12):1413–22]. We describe a unique case of a COVID-19-positive male who presented with severe respiratory symptoms, deteriorated quickly, and was intubated. Workup of severe progressive pancytopenia and bone marrow examination revealed HCL without splenomegaly and with atypical unusual loss of CD123. To our knowledge, this is the first case of CD123-negative HCL without splenomegaly associated with COVID-19 infection as the initial presentation.
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Affiliation(s)
- Samah Kohla
- Department of Lab Medicine and Pathology, Hematology Division, Hamad Medical Corporation, Doha, Qatar.,Department of Clinical Pathology, Hematology Division, Faculty of Medicine, Al-Azhar University, Cairo, Egypt.,Weill Cornell Medicine, Doha, Qatar
| | - Feryal A Ibrahim
- Department of Lab Medicine and Pathology, Hematology Division, Hamad Medical Corporation, Doha, Qatar
| | - Mahmood B Aldapt
- Department of Hematology-Oncology, Hamad Medical Corporation, Doha, Qatar
| | - Hesham ELSabah
- Department of Hematology-Oncology, Hamad Medical Corporation, Doha, Qatar
| | - Shehab Mohamed
- Department of Hematology-Oncology, Hamad Medical Corporation, Doha, Qatar
| | - Reda Youssef
- Department of Clinical Imaging, Hamad Medical Corporation, Doha, Qatar.,Weill Cornell Medicine, Doha, Qatar
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Kreitman RJ, Pastan I. Development of Recombinant Immunotoxins for Hairy Cell Leukemia. Biomolecules 2020; 10:E1140. [PMID: 32756468 PMCID: PMC7464581 DOI: 10.3390/biom10081140] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/22/2020] [Accepted: 07/24/2020] [Indexed: 01/08/2023] Open
Abstract
Hairy cell leukemia (HCL) is an indolent B-cell malignancy with excellent initial response to purine analogs pentostatin or cladribine, but patients are rarely, if ever, cured. Younger patients will usually need repeat chemotherapy which has declining benefits and increasing toxicities with each course. Targeted therapies directed to the BRAF V600E mutation and Bruton's tyrosine kinase may be helpful, but rarely eradicate the minimal residual disease (MRD) which will eventually lead to relapse. Moxetumomab pasudotox (Moxe) is an anti-CD22 recombinant immunotoxin, which binds to CD22 on HCL cells and leads to apoptotic cell death after internalization and trafficking of the toxin to the cytosol. Phase I testing achieved a complete remission (CR) rate of 57% in relapsed/refractory HCL. Most CRs were without MRD and eradication of MRD correlated with prolonged CR duration. Patients were often MRD-free after five years. Important mild-moderate toxicities included capillary leak and hemolytic uremic syndromes which could be prevented and managed conservatively. A phase 3 trial met its endpoint of durable CR with acceptable toxicity, leading to FDA approval of Moxe for relapsed/refractory HCL, under the name Lumoxiti. Moxe combined with rituximab is currently being evaluated in relapsed/refractory HCL to improve the rate of MRD-free CR.
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Affiliation(s)
- Robert J. Kreitman
- Laboratory of Molecular Biology, Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA;
- National Institutes of Health, Building 37/5124b, 9000 Rockville Pike, Bethesda, MD 20892, USA
| | - Ira Pastan
- Laboratory of Molecular Biology, Clinical Center, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA;
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Pizzi M, Agostinelli C, Righi S, Gazzola A, Mannu C, Galuppini F, Fassan M, Visentin A, Piazza F, Semenzato GC, Rugge M, Sabattini E. Aberrant expression of CD10 and BCL6 in mantle cell lymphoma. Histopathology 2017. [PMID: 28628241 DOI: 10.1111/his.13286] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
AIMS Mantle cell lymphoma (MCL) is characterized by distinctive histological and molecular features. Aberrant expression of BCL6 and CD10 has been reported occasionally, but the biological features of such cases are largely unknown. This study aimed to define the epidemiological, histological and cytogenetic characteristics of BCL6 and CD10-positive MCLs, also investigating possible biological features. METHODS AND RESULTS A total of 165 cases of cyclin D1 and t(11;14)(q13;q34)-positive MCLs were studied for CD10 and BCL6 immunohistochemical expression, which was documented in 26 of 165 (15.8%) cases (BCL6 17 of 165; CD10 11 of 165; BCL6 and CD10 co-expression two of 165). CD10-positivity was significantly more frequent in females (63.3%; P < 0.01). Either expression correlated significantly with higher mean proliferation index and higher prevalence of MUM1 positivity (P < 0.05). Fluorescence in-situ hybridization (FISH) for BCL6 (3q27) gene derangements was performed on the BCL6- and CD10-positive cases and 98 matched controls: amplifications were documented more frequently in BCL6-positive than -negative cases (50.0% versus 19.4% of cases) (P < 0.05). The mutational status of the variable immunoglobulin heavy chain genes (IGVH) was investigated by Sanger sequencing: five of the six successfully tested cases (83.3%) showed no somatic hypermutations. CONCLUSIONS Aberrant CD10 and BCL6 expression defines a subset of MCLs with higher mean Ki-67 index and higher prevalence of MUM1 expression. BCL6 protein positivity correlates with cytogenetic aberrations involving the BCL6 gene. Although examined successfully in few cases, the high prevalence of unmutated IGVH genes also points at a pregerminal cell origin for these phenotypically aberrant cases.
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Affiliation(s)
- Marco Pizzi
- Surgical Pathology and Cytopathology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Claudio Agostinelli
- Haematopathology Unit, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, Sant'Orsola University Hospital, Bologna, Italy
| | - Simona Righi
- Haematopathology Unit, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, Sant'Orsola University Hospital, Bologna, Italy
| | - Anna Gazzola
- Haematopathology Unit, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, Sant'Orsola University Hospital, Bologna, Italy
| | - Claudia Mannu
- Haematopathology Unit, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, Sant'Orsola University Hospital, Bologna, Italy
| | - Francesca Galuppini
- Surgical Pathology and Cytopathology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Matteo Fassan
- Surgical Pathology and Cytopathology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Andrea Visentin
- Hematology and Clinical Immunology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Francesco Piazza
- Hematology and Clinical Immunology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Gianpietro C Semenzato
- Hematology and Clinical Immunology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Massimo Rugge
- Surgical Pathology and Cytopathology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy
| | - Elena Sabattini
- Haematopathology Unit, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, Sant'Orsola University Hospital, Bologna, Italy
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Cortazar JM, DeAngelo DJ, Pinkus GS, Morgan EA. Morphological and immunophenotypical features of hairy cell leukaemia involving lymph nodes and extranodal tissues. Histopathology 2017; 71:112-124. [PMID: 28261866 DOI: 10.1111/his.13206] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 02/28/2017] [Indexed: 12/01/2022]
Abstract
AIMS Hairy cell leukaemia (HCL) is a rare B cell neoplasm that mainly affects bone marrow (BM), peripheral blood (PB) and spleen. Involvement of lymph nodes and extranodal structures is considered infrequent. Herein we describe our institutional experience of nodal (n = 10) and extranodal (n = 3) HCL during a 30-year period. METHODS AND RESULTS Ten patients had prior evidence of HCL within the BM or PB at a median 35.8 months before nodal/extranodal diagnosis (range: <1-175 months), and HCL was diagnosed concurrently within the bone marrow of one additional patient. Nodal involvement showed distinct architectural patterns, including diffuse (62% of cases), sinusoidal (25%) and nodular (13%). Extranodal involvement was characterized as diffuse infiltration through underlying structures in all cases. Morphological features ranged from classic 'fried-egg' cytology to a plasmacytoid appearance. Nodal/extranodal disease showed an overlapping immunophenotypical profile with other small B cell lymphomas, including expression of cyclin D1 (70%), CD43 (55%), CD10 (38%) and CD5 (8%). Rates of both CD43 and CD10 reactivity were higher than described previously in leukaemic HCL, suggesting that expression may be enriched in cases with extramedullary extension. CONCLUSIONS Although uncommon, HCL should be considered in the differential diagnosis of small B cell neoplasms involving nodal/extranodal sites, given the therapeutic implications. In particular, recent discoveries including detection of the BRAFV600E mutation in nearly all cases of HCL and the availability of an antibody to CD103 for use in paraffin-embedded tissues will facilitate the distinction of HCL from other small B cell lymphomas in the nodal/extranodal setting.
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Affiliation(s)
- Jacqueline M Cortazar
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Daniel J DeAngelo
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Geraldine S Pinkus
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Elizabeth A Morgan
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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