1
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Wang X, Wang W, Vega F, Quesada AE. Aggressive Mediastinal Lymphomas. Semin Diagn Pathol 2024; 41:125-139. [PMID: 34175178 DOI: 10.1053/j.semdp.2021.06.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 06/10/2021] [Indexed: 11/11/2022]
Abstract
The mediastinum contains essentially all major intrathoracic organs except for the lungs. A variety of both benign and malignant tumors can involve the mediastinum, of which lymphoma is the most common malignancy. Compared to secondary mediastinal involvement by systemic lymphomas, primary mediastinal lymphomas are less common with several specific entities that are mainly confined to mediastinal lymph nodes, and/or thymus. This review will summarize the clinical, histologic, immunophenotypic and molecular genetic features of the most common and most aggressive primary mediastinal lymphomas as well as provide suggested immunohistochemistry panels and differential diagnoses.
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Affiliation(s)
- Xiaoqiong Wang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Wei Wang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Francisco Vega
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Andres E Quesada
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX.
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2
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El Hussein S, Evans AG, Fang H, Wang W, Medeiros LJ. Unicentric Castleman Disease: Illustration of Its Morphologic Spectrum and Review of the Differential Diagnosis. Arch Pathol Lab Med 2024; 148:99-106. [PMID: 36920021 DOI: 10.5858/arpa.2022-0404-ra] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2022] [Indexed: 03/16/2023]
Abstract
CONTEXT.— Unicentric Castleman disease (UCD) is a dynamic entity with a wide spectrum of morphologic findings. UCD can be further subdivided into hyaline-vascular and mixed/plasmacytic variants. Hyaline-vascular UCD has both follicular and interfollicular (stromal) changes, and occasionally these lesions show a skewed representation of either the follicular or stromal compartments. Plasmacytosis is usually minimal in the hyaline-vascular variant. The mixed/plasmacytic variant of UCD is composed of sheets of plasma cells often associated with a variable number of follicles with regressive changes. OBJECTIVE.— To illustrate the differential diagnosis of UCD, as it is quite broad and includes lymphomas, plasma cell neoplasms, stromal neoplasms such as follicular dendritic cell sarcoma and vascular neoplasms, immunoglobulin G4-related disease, infections, and other rare lesions. An additional objective is to enhance awareness of the morphologic features of UCD in excisional and in small core-needle biopsy specimens, the latter of which may inadvertently target follicle- or stroma-rich areas, causing diagnostic challenges. DATA SOURCES.— In this review, we provide readers a concise illustration of the morphologic spectrum of UCD that we have encountered in our practice and a brief discussion of entities in the differential diagnosis. CONCLUSIONS.— UCD exhibits a broad spectrum of morphologic changes, and awareness of these morphologic variations is key to avoid misdiagnosis.
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Affiliation(s)
- Siba El Hussein
- From the Department of Pathology, University of Rochester Medical Center, Rochester, New York (El Hussein, Evans)
| | - Andrew G Evans
- From the Department of Pathology, University of Rochester Medical Center, Rochester, New York (El Hussein, Evans)
| | - Hong Fang
- the Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston (Fang, Wang, Medeiros)
| | - Wei Wang
- the Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston (Fang, Wang, Medeiros)
| | - L Jeffrey Medeiros
- the Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston (Fang, Wang, Medeiros)
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3
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Mariani RA, Courville EL. Reactive Lymphadenopathy in the Pediatric Population with a Focus on Potential Mimics of Lymphoma. Semin Diagn Pathol 2023; 40:371-378. [PMID: 37295994 DOI: 10.1053/j.semdp.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023]
Abstract
Benign lymphadenopathy is common in the pediatric population and may be clinically striking. As in adults, lymph node evaluation in pediatric patients requires careful morphologic and immunohistochemical assessment and clinical contextualization of the findings. It is important for the pathologist to be familiar with benign and reactive conditions that may mimic malignancy. This review presents non-neoplastic or indolent processes or patterns of lymphoid hyperplasia that may be confused with or raise the differential of lymphoma, with a focus on those more commonly encountered in the pediatric/adolescent population.
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Affiliation(s)
- Rachel A Mariani
- University of Arizona College of Medicine-Phoenix, Dept. of Pathology & Laboratory Medicine, USA
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4
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Ghezavati A, Liang CA, Mais D, Nazarullah A. Indolent T-lymphoblastic proliferation involving hepatocellular carcinoma-presentation in novel settings and comprehensive review of literature. J Hematop 2023; 16:167-175. [PMID: 38175402 DOI: 10.1007/s12308-023-00554-7] [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] [Received: 04/12/2023] [Accepted: 07/06/2023] [Indexed: 01/05/2024] Open
Abstract
Indolent T-lymphoblastic proliferation (iT-LBP) is a rare, non-clonal, extrathymic lymphoid proliferation with an immature T cell phenotype, indolent clinical course, and excellent prognosis. Although their pathogenesis is unclear, they are reported to be associated with Castleman disease, follicular dendritic cell tumors/sarcomas, angioimmunoblastic T cell lymphoma, hepatocellular carcinoma (HCC), myasthenia gravis, and acinic cell carcinoma. There are around 51 reported cases of iT-LBP in the literature. Recognition and accurate diagnosis of this entity is critical as it shares morphologic and immunophenotypic features with an aggressive malignancy-acute T cell leukemia/lymphoma (T-ALL). IT-LBP in HCC post-liver transplant and in metastatic sites has not been reported in the literature. Two case reports of patients presenting with recurrent and metastatic HCC in post-liver transplant settings are described. A 50-year-old man with an end-stage liver disease with HCC underwent liver transplant. A year later, he developed pulmonary metastasis with associated iT-LBP. A 69-year-old man underwent liver transplant for end-stage liver disease and HCC. Eighteen months later, he developed recurrent HCC in the transplanted liver and omental metastasis; both sites showed HCC with iT-LBP. iT-LBP in both patients expressed TdT, CD3, and CD4 and lacked CD34 and clonal T cell receptor gene rearrangements. On retrospective review, the pre-transplant HCC specimens lacked iT-LBP. We present two cases of iT-LBP associated with HCC in novel settings-in post-liver transplant patients and in recurrent/metastatic sites of HCC. In addition, a comprehensive literature review of clinical, histological, and immunophenotypic characteristics of reported cases of iT-LBP is presented.
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Affiliation(s)
- Alireza Ghezavati
- Department of Pathology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Dr, San Antonio, TX, 78229, USA
| | - Christine A Liang
- Department of Pathology, South Texas Pathology Associates, San Antonio, TX, USA
| | - Daniel Mais
- Department of Pathology, University of Louisville Health, Kentucky, USA
| | - Alia Nazarullah
- Department of Pathology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Dr, San Antonio, TX, 78229, USA.
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5
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Han W, Wang B, Yong X, Zhang Y, Shao M, Wang C. Indolent T-lymphoblastic proliferation with fibrolamellar hepatocellular carcinoma developed after colorectal adenocarcinoma: a case report. Pathol Oncol Res 2023; 29:1611151. [PMID: 37252318 PMCID: PMC10213281 DOI: 10.3389/pore.2023.1611151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 05/02/2023] [Indexed: 05/31/2023]
Abstract
Objective: Indolent T-lymphoblastic proliferation (iT-LBP) is a non-neoplastic disease with an indolent clinical course, manifesting as hyperplasia of immature extrathymic T-lymphoblastic cells. Isolated iT-LBP has been observed, but the majority of iT-LBP cases has been seen in conjunction with other diseases. iT-LBP is easily misdiagnosed as T-lymphoblastic lymphoma/leukemia, and understanding the disease of indolent T-lymphoblastic proliferation may prevent misdiagnosis and missed diagnosis in pathological diagnosis. Case presentation: We report a case morphology, immunophenotypic, and molecular features of iT-LBP combined with fibrolamellar hepatocellular carcinoma developed after colorectal adenocarcinoma and review relevant literature. Conclusion: iT-LBP combined with fibrolamellar hepatocellular carcinoma developed after colorectal adenocarcinoma is relatively rare and should always be considered as a differential diagnosis of T-lymphoblastic lymphoma and scirrhous hepatocellular carcinoma as the two disorders show highly similar clinical features.
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Affiliation(s)
- Wen Han
- Department of Pathology, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Bei Wang
- Graduate Education Department, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Xiang Yong
- Department of Pathology, Anhui Wanbei Coal-Electricity Group General Hospital, Suzhou, China
| | - Yi Zhang
- Department of Pathology, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Mingyu Shao
- Department of Pathology, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Chun Wang
- Department of Pathology, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
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6
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Shi X, Liao M, Yin X, Chen Y, Huang C, Yin W, Li J. Case report: The stroma-rich variant of Castleman’s disease of hyaline-vascular type with atypical stromal cell proliferation and malignant potential: An exceptional rare case occurred in mediastinal lymph node. Front Oncol 2023; 13:1008587. [PMID: 37007164 PMCID: PMC10061130 DOI: 10.3389/fonc.2023.1008587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 02/27/2023] [Indexed: 03/18/2023] Open
Abstract
The stroma-rich variant of Castleman disease of hyaline-vascular type (SR-HVCD) is characterized by interfollicular proliferation of the fibroblastic, myofibroblastic, and/or histiocytic-derived stromal cells, occurred in a background of Castleman disease of hyaline-vascular type (HVCD). It has been considered as a hyperplastic disorder by far. Herein, we presented a case of a 40-year-old male suffering from an occupation in the right middle mediastinum. Microscopically, the lesion was characterized by atretic lymphoid follicles and overgrowth of the interfollicular spindle-shaped cells. Those spindle cells were histologically bland in some areas, while exhibited notable cellular atypia and focal necrosis in other areas. SMA and CD68 were immunostained with a subset of the spindle cells in both areas, whereas p53 staining was only perceived in areas with markedly cellular atypia. In addition, indolent T-lymphoblastic proliferation (iT-LBP) was present inside the lesion. The patient developed multiple sites metastases 4 months after surgery, and succumbed to the disease at 7 months. Our case demonstrates for the first time that SR-HVCD have a tumorigenesis potential rather than a simple hyperplastic process. Such disorder should be carefully evaluated to avoid underdiagnosis.
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Affiliation(s)
- Xiaoxin Shi
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Mengying Liao
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Xiaomin Yin
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Yaoli Chen
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Chuqiang Huang
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Weihua Yin
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Jian Li
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, China
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, China
- *Correspondence: Jian Li,
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7
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Saglam A, Singh K, Gollapudi S, Kumar J, Brar N, Butzmann A, Warnke R, Ohgami RS. Indolent T-lymphoblastic proliferation: A systematic review of the literature analyzing the epidemiologic, clinical, and pathologic features of 45 cases. Int J Lab Hematol 2022; 44:700-711. [PMID: 35577551 DOI: 10.1111/ijlh.13873] [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: 01/31/2022] [Accepted: 04/25/2022] [Indexed: 11/26/2022]
Abstract
An indolent T-lymphoblastic proliferation (iT-LBP) is a rare benign disorder characterized by an abnormal expansion of immature T-cells, which morphologically can mimic malignancy. Since the first case was described in 1999, dozens more have been reported in the literature. However, the epidemiologic, clinical, pathologic, and biologic features of this disease have not been well described. Here, we retrospectively reviewed all known cases reported in the literature to better understand this entity. A PubMed search up to January 2022 highlighted 25 papers describing cases/case series of iT-LBP, one of which was a case presentation in a slide workshop. Except for 9 of the cases in one of the papers, where it was evident that the number of CD3+/TdT+ cells were too few to conform with a diagnosis of iT-LBP, all papers and all the cases reported were included in the study amounting to a total of 45 cases. Clinicopathologic characteristics were analyzed using descriptive statistics and frequencies. Our analysis highlighted the previously known association with Castleman disease and Castleman-like features and underlined its association with dendritic cell proliferations in general, as well as uncovering high frequency of concurrence with hepatocellular carcinoma and autoimmune diseases, most notably myasthenia gravis, paraneoplastic pemphigus and paraneoplastic autoimmune multiorgan syndrome. Furthermore, the co-expression of CD4 and CD8 and high prevalence of extranodal disease and recurrences were other less well described features that were revealed.
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Affiliation(s)
- Arzu Saglam
- Department of Pathology, Hacettepe University, Ankara, Turkey
| | - Kunwar Singh
- Department of Pathology, University of California San Francisco, San Francisco, California, USA
| | - Sumanth Gollapudi
- Department of Pathology, University of California San Francisco, San Francisco, California, USA
| | - Jyoti Kumar
- Department of Pathology, Stanford University, Stanford, California, USA
| | - Nivaz Brar
- Department of Pathology, Stanford University, Stanford, California, USA
| | - Alexandra Butzmann
- Department of Pathology, University of California San Francisco, San Francisco, California, USA
| | - Roger Warnke
- Department of Pathology, Stanford University, Stanford, California, USA
| | - Robert S Ohgami
- Department of Pathology, University of California San Francisco, San Francisco, California, USA
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8
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Stone AB, Grzywacz BJ, Courville EL, Linden MA. Indolent B-Lineage Precursor Populations Identified by Flow Cytometry and Immunohistochemistry in Benign Lymph Nodes. Am J Clin Pathol 2022; 157:202-211. [PMID: 34528663 DOI: 10.1093/ajcp/aqab120] [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] [Received: 03/09/2021] [Accepted: 06/14/2021] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES In this retrospective study, we report a series of benign lymph nodes showing small populations of normal B-cell precursors characterized by flow cytometry and immunohistochemistry. METHODS Ten cases identified during clinical flow cytometry practice were retrospectively reanalyzed with particular attention to hematogone categorization and enumeration. Immunohistochemical staining was performed on five excisional lymph node biopsy specimens to characterize the morphologic correlate. RESULTS Populations of hematogones ranging from 0.13% to 1.86% (median, 0.51%) of all viable leukocytes were demonstrated in 10 benign lymph node samples from eight different patients ranging in age from 17 to 45 years (median, 37.5). These hematogones showed a characteristic immunophenotype (CD19+/CD10+) and maturational pattern by flow cytometry, with progression from stage 1 (median, 0.03%) to stage 2 (median, 0.19%) to stage 3 (median, 0.26%) seen in all cases. Immunohistochemical staining on five excisional biopsy specimens demonstrated a distinct perisinusoidal distribution of CD10+/CD20+ cells with a subset of TdT+ cells, providing a morphologic correlate. CONCLUSIONS To our knowledge, this is the first study to characterize distinct hematogone populations within benign lymph nodes by both flow cytometry and immunohistochemistry. Recognizing these normal B-cell precursor populations is important to avoid their miscategorization as a CD10+ B-cell neoplasm.
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Affiliation(s)
- Andrew B Stone
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Bartosz J Grzywacz
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | | | - Michael A Linden
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
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9
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Karki NR, Arfa AS, Savage N, Kutlar A. Indolent T-Lymphoblastic Proliferation in Idiopathic Multicentric Castleman Disease. Acta Haematol 2021; 145:214-220. [PMID: 34818661 DOI: 10.1159/000520240] [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] [Received: 06/22/2021] [Accepted: 10/14/2021] [Indexed: 11/19/2022]
Abstract
Benign and polyclonal proliferation of immature T cells in a lymph node with preserved morphological architecture is called indolent T-lymphoblastic proliferation (iT-LBP). Although overall rare, they have been described in association with both benign and malignant disorders including Castleman disease. We report the first case of idiopathic multicentric Castleman disease associated with iT-LBP, all previous reports of iT-LBP in Castleman disease were unicentric. A 37-year-old-male presented with 3 months of fevers and B-symptoms and was found to have enlargement of multiple bilateral lymph node sites on both sides of diaphragm along with splenomegaly. Anemia, elevated C-reactive protein, hypoalbuminemia, and elevated interleukin-6 levels were present. Biopsy of a lymph node showed features suggestive of idiopathic multicentric Castleman disease and iT-LBP. Bone marrow biopsy was unremarkable. Siltuximab and steroids were used to treat the condition.
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Affiliation(s)
- Nabin Raj Karki
- Division of Hematology/Oncology, Augusta University, Augusta, Georgia, USA
| | | | - Natasha Savage
- Department of Pathology, Augusta University, Augusta, Georgia, USA
| | - Abdullah Kutlar
- Division of Hematology/Oncology, Augusta University, Augusta, Georgia, USA
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10
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Yuanyuan Z, Jianlan X, Yanlin Z, Xiaoge Z. Indolent T-lymphoblastic proliferation: a report of three cases. Virchows Arch 2021; 480:1121-1126. [PMID: 34482472 DOI: 10.1007/s00428-021-03184-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 08/02/2021] [Accepted: 08/11/2021] [Indexed: 01/28/2023]
Abstract
Indolent T-lymphoblastic proliferation (iT-LBP) is the extrathymic proliferation of nonclonal TdT + T cells and is typically associated with lymphoid disorders. Although one study revealed that iT-LBP occurred in angioimmunoblastic T-cell lymphoma, no other lymphoma-related cases have been reported. Here, we report three cases of concurrent iT-LBP and benign or malignant lymphoid disorders. The first patient had bilateral cervical lymph node enlargement, and the resected lymph node showed polyclonal precursor T-cells distributed between benign hyperplastic lymphoid follicles. In the second case, iT-LBP occurred in peripheral T-cell lymphoma with a follicular growth pattern, showing that precursor T-cells were distributed between neoplastic follicles composed of CD4 + and CXCL13 + T-cells. In the third case, polyclonal precursor T-cells were distributed between the neoplastic follicles of follicular lymphoma. In summary, our results indicate an association between iT-LBP and reactive lymphoid hyperplasia (case 1) and lymphoma (cases 2 and 3).
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Affiliation(s)
- Zheng Yuanyuan
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, People's Republic of China
| | - Xie Jianlan
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, People's Republic of China
| | - Zhang Yanlin
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, People's Republic of China
| | - Zhou Xiaoge
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, People's Republic of China.
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11
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Abstract
Lymphoproliferative disorders comprise 50% to 60% of all mediastinal malignancies in both children and adults. Primary mediastinal involvement is rare (∼5%), whereas secondary mediastinal involvement by systemic disease is more common (10% to 25%). Primary mediastinal disease is defined as involvement by a lymphoproliferative disorder of mediastinal lymph nodes, the thymus, and/or extranodal mediastinal organs without evidence of systemic disease at presentation. In this review, the clinical, radiologic, histopathologic, immunohistochemical, and genetic features of some of the most characteristic mediastinal lymphoproliferative disorders are presented. The entities discussed here include: classic Hodgkin lymphoma with emphasis on nodular sclerosis and mixed cellularity types, and non-Hodgkin lymphomas, including primary mediastinal (thymic) large B-cell lymphoma, mediastinal gray zone lymphoma, mediastinal diffuse large B-cell lymphoma, thymic marginal zone lymphoma, mediastinal plasmacytoma, T-lymphoblastic lymphoma, and anaplastic large cell lymphoma. Although not a malignant process, hyaline vascular Castleman disease is also discussed here as this disorder commonly involves the mediastinum. Despite multiple advances in hematopathology in recent decades, the day-to-day diagnosis of these lesions still requires a morphologic approach and a proper selection of immunohistochemical markers. For this reason, it is crucial for general pathologists to be familiar with these entities and their particular clinicoradiologic presentation.
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Affiliation(s)
- Sergio Pina-Oviedo
- Department of Pathology and Laboratory Services, University of Arkansas for Medical Sciences, Little Rock, AR
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12
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T-lymphoblastic leukemia/lymphoma with interfollicular growth pattern and Castleman-like morphologic features. J Hematop 2021. [DOI: 10.1007/s12308-021-00446-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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13
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Horna P, Shi M, Olteanu H, Johansson U. Emerging Role of T-cell Receptor Constant β Chain-1 (TRBC1) Expression in the Flow Cytometric Diagnosis of T-cell Malignancies. Int J Mol Sci 2021; 22:ijms22041817. [PMID: 33673033 PMCID: PMC7918842 DOI: 10.3390/ijms22041817] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/09/2021] [Accepted: 02/09/2021] [Indexed: 02/07/2023] Open
Abstract
T-cell clonality testing is integral to the diagnostic work-up of T-cell malignancies; however, current methods lack specificity and sensitivity, which can make the diagnostic process difficult. The recent discovery of a monoclonal antibody (mAb) specific for human TRBC1 will greatly improve the outlook for T-cell malignancy diagnostics. The anti-TRBC1 mAb can be used in flow cytometry immunophenotyping assays to provide a low-cost, robust, and highly specific test that detects clonality of immunophenotypically distinct T-cell populations. Recent studies demonstrate the clinical utility of this approach in several contexts; use of this antibody in appropriately designed flow cytometry panels improves detection of circulating disease in patients with cutaneous T-cell lymphoma, eliminates the need for molecular clonality testing in the context of large granular lymphocyte leukemia, and provides more conclusive results in the context of many other T-cell disorders. It is worth noting that the increased ability to detect discrete clonal T-cell populations means that identification of T-cell clones of uncertain clinical significance (T-CUS) will become more common. This review discusses this new antibody and describes how it defines clonal T-cells. We present and discuss assay design and summarize findings to date about the use of flow cytometry TRBC1 analysis in the field of diagnostics, including lymph node and fluid sample investigations. We also make suggestions about how to apply the assay results in clinical work-ups, including how to interpret and report findings of T-CUS. Finally, we highlight areas that we think will benefit from further research.
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Affiliation(s)
- Pedro Horna
- Division of Hematopathology, Mayo Clinic, Rochester, MN 55905, USA; (P.H.); (M.S.); (H.O.)
| | - Min Shi
- Division of Hematopathology, Mayo Clinic, Rochester, MN 55905, USA; (P.H.); (M.S.); (H.O.)
| | - Horatiu Olteanu
- Division of Hematopathology, Mayo Clinic, Rochester, MN 55905, USA; (P.H.); (M.S.); (H.O.)
| | - Ulrika Johansson
- SI-HMDS, University Hospitals Bristol and Weston NHS Foundation Trust, Bristol BS1 3NU, UK
- Correspondence:
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14
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Brar N, Butzmann A, Kumar J, Peerani R, Morgan EA, Grigoriadis G, Kumar B, Tatarczuch RM, Warnke RA, Ohgami RS. LIM domain only 2 (LMO2) expression distinguishes T-lymphoblastic leukemia/lymphoma from indolent T-lymphoblastic proliferations. Histopathology 2020; 77:984-988. [PMID: 32526041 DOI: 10.1111/his.14176] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 06/04/2020] [Accepted: 06/07/2020] [Indexed: 11/29/2022]
Abstract
AIMS An indolent T-lymphoblastic proliferation (iT-LBP) is a benign, reactive expansion of immature terminal deoxynucleotidyl transferase (TdT)-positive T cells found in extrathymic tissues. iT-LBP can be challenging to distinguish from malignant processes, specifically T-lymphoblastic lymphoma (T-LBL), given the overlapping clinical and histological features. Recently, it has been shown that LIM domain only 2 (LMO2) is overexpressed in T-LBL but not in reactive immature TdT+ T cells in the thymus. On the basis of these findings, the aim of this study was to investigate the expression of LMO2 by using immunohistochemistry and its role in differentiating iT-LBPs from T-LBLs. METHODS AND RESULTS We retrospectively identified cases of iT-LBP and T-LBL from the pathology archives of four institutions. Seven iT-LBP cases (including five new cases that have not been reported in the literature) and 13 T-LBL cases were analysed. Clinical, morphological, immunophenotypic and molecular data were analysed. Immunohistochemical staining with LMO2 was performed on all iT-LBP and T-LBL cases. A review of five new iT-LBP cases showed similar morphological, immunophenotypic and molecular features to those of previously reported cases. All iT-LBP cases were negative for LMO2 (0/7), whereas 92% of T-LBL cases (12/13) expressed LMO2; the sensitivity was 92% (confidence interval 64-100%) and the specificity was 100% (confidence interval 59-100%). CONCLUSION We confirm previously published findings that iT-LBP cases show highly overlapping morphological and immunophenotypic features with T-LBL. Importantly, LMO2 expression is a sensitive and specific marker with which to rule out iT-LBP.
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Affiliation(s)
- Nivaz Brar
- California Northstate University, Elk Grove, CA, USA
| | - Alexandra Butzmann
- Department of Pathology, University of California San Francisco, San Francisco, CA, USA
| | - Jyoti Kumar
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - Raheem Peerani
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - Elizabeth A Morgan
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | | | - Beena Kumar
- Department of Pathology, Monash Health, Melbourne, Victoria, Australia
| | | | - Roger A Warnke
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - Robert S Ohgami
- Department of Pathology, University of California San Francisco, San Francisco, CA, USA
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15
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Scientific Advances and the Evolution of Diagnosis, Subclassification and Treatment of Lymphoma. Arch Med Res 2020; 51:749-764. [PMID: 32553461 DOI: 10.1016/j.arcmed.2020.05.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 05/26/2020] [Indexed: 12/11/2022]
Abstract
The diagnosis of lymphoma has evolved tremendously over time. Initially, diagnosis of lymphoma was largely based on morphology alone. Over time, immunophenotyping using flow cytometry and immunohistochemistry, and then in situ hybridization, have contributed dramatically to the pathologist's ability to recognize, diagnose and subclassify lymphomas more precisely. In recent years, cytogenetic and molecular genetic techniques have developed that allow evaluation of abnormalities in lymphomas, leading to an understanding of their pathogenesis and opening the door to targeted therapies that will lead to better outcomes for lymphoma patients.
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Sirolimus for the Treatment of Airway Obstruction due to Indolent T-Lymphoblastic Proliferation. Case Reports Immunol 2020; 2019:1724083. [PMID: 31976096 PMCID: PMC6959153 DOI: 10.1155/2019/1724083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 10/01/2019] [Accepted: 10/17/2019] [Indexed: 12/04/2022] Open
Abstract
Introduction Indolent T-lymphoblastic proliferation (iT-LBP) is a rare nonmalignant entity that presents as a proliferation of T-lymphoblasts. We report a first such case with a recurrent laryngeal obstruction presentation that was successfully controlled with Sirolimus. Case presentation This is the case of a 29-year-old female who presented with a recurrent significant lymphoid hyperplasia in the adenoid and tongue base region as well as a right cervical lymph node. After repeated adenoidectomies and tonsillectomies, and based on pathological and clinical findings she was diagnosed with iT-LBP. Trials of radiotherapy and immunotherapy with cyclosporine and rituximab all failed to control the progression of the disease. Sirolimus was finally able to restrict the growth and improve her symptoms. Conclusion While It-LBP does not usually require treatment, it is important to report cases in which treatment was crucial for the survival of the patient, and the effective role of Sirolimus in doing so, without any major adverse effects.
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Primary Mediastinal Nodal and Extranodal Non-Hodgkin Lymphomas: Current Concepts, Historical Evolution, and Useful Diagnostic Approach: Part 2. Adv Anat Pathol 2019; 26:371-389. [PMID: 31567129 DOI: 10.1097/pap.0000000000000248] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Primary mediastinal non-Hodgkin lymphomas (PM-NHLs) represent ∼5% of all non-Hodgkin lymphomas (NHLs) and comprise lymphomas of B-cell and T-cell origin. PM-NHLs are defined as involvement of mediastinal lymph nodes, thymus, and/or mediastinal organs (heart, lung, pleura, pericardium) by NHL without evidence of systemic disease at presentation. The clinical scenario is variable and depends on the lymphoma subtype. The radiologic presentation is also variable ranging from a mediastinal mass with or without superior vena cava syndrome, a pleural or a cardiac mass associated with effusion, or as an effusion only. The diagnosis of PM-NHLs can only be established by microscopic evaluation, and therefore, general pathologists should be aware of these tumors and familiar with their diagnostic approach. The most common anterior mediastinal NHLs (90% to 95%) are primary mediastinal (PM) large B-cell lymphoma and T-lymphoblastic lymphoma. Thymic marginal zone lymphoma and mediastinal gray zone lymphoma are very rare. The remainder PM-NHLs involving middle or posterior mediastinum include diffuse large B-cell lymphoma (DLBCL) and rare cases of T-cell lymphoma, including anaplastic large cell lymphoma and breast implant-associated anaplastic large cell lymphoma extending to the anterior mediastinum. Primary pleural and cardiac NHLs are mostly DLBCLs. Other rare subtypes of PM-NHLs include DLBCL associated with chronic inflammation/pyothorax-associated lymphoma, fibrin-associated DLBCL (both Epstein-Barr virus positive), and pleural and/or pericardial primary effusion lymphoma (human herpesvirus-8 positive/Epstein-Barr virus positive). We review the historical aspects, epidemiology, clinicoradiologic features, histopathology, immunohistochemistry, differential diagnosis, and relevant cytogenetic and molecular features of the remaining mediastinal B-cell lymphomas, including primary thymic marginal zone lymphoma of the mucosa-associated lymphoid tissue type, other PM small B-cell lymphomas, PM plasmacytoma, and the most relevant PM T-cell lymphomas.
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Suárez-Vilela D, Izquierdo FM. Mediastinal and pleuropulmonary myeloid sarcoma with HBME1 and podoplanin expression. A diagnostic pitfall. APMIS 2019; 128:65-68. [PMID: 31628821 DOI: 10.1111/apm.13002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 10/07/2019] [Indexed: 11/30/2022]
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Follicular Dendritic Cell Sarcoma With Indolent T-Lymphoblastic Proliferation Is Associated With Paraneoplastic Autoimmune Multiorgan Syndrome. Am J Surg Pathol 2019; 42:1647-1652. [PMID: 30222603 DOI: 10.1097/pas.0000000000001158] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Nonclonal expansions of immature T cells outside of the thymus, termed indolent T-lymphoblastic proliferation (iT-LBP), have been identified in rare lymphoproliferative disorders. We report that iT-LBP is a frequent finding in cases of follicular dendritic cell sarcoma (FDCS), and shows an association with paraneoplastic autoimmune multiorgan syndrome (PAMS). We studied 31 cases of FDCS by paraffin immunohistochemistry using antibodies to CD21, CD23, CD35, clusterin, CXCL13, podoplanin, CD3, CD4, CD8, CD20, CD1a, and TdT. Chart review was performed to characterize the clinical behavior including evidence of autoimmune disease. FDCS occurred in a wide variety of nodal and extranodal sites. Fourteen of 31 (45%) cases contained immature TdT-positive T cells; in 5 cases these cells were numerous and present throughout the tumor. Four of these 5 patients with numerous immature T cells developed autoimmune disease, clinically categorized as PAMS and/or myasthenia gravis. PAMS persisted after tumor resection, causing severe morbidity and mortality. These findings suggest that the neoplastic follicular dendritic cells can recruit or foster the proliferation of immature T cells and that these cells may play a role in mediating PAMS. Recognition of iT-LBP in FDCS is important to avoid misdiagnosis as thymoma or T-lymphoblastic lymphoma, and may predict serious autoimmune complications in some patients.
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Boddu P, Thakral B, Alhuraiji A, Pemmaraju N, Kadia T, Ohanian M, Ravandi F, Jabbour E, Wierda W, Khoury JD, Jain N. Distinguishing thymoma from T-lymphoblastic leukaemia/lymphoma: a case-based evaluation. J Clin Pathol 2019; 72:251-257. [PMID: 30467242 DOI: 10.1136/jclinpath-2018-205399] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 10/24/2018] [Accepted: 10/25/2018] [Indexed: 11/03/2022]
Abstract
T-lymphoblastic lymphoma and thymoma are distinct primary mediastinal neoplasms that can have similar clinical presentations and overlapping histological features. Microscopic distinction is occasionally difficult because the immature lymphocytes associated with thymoma may resemble T-lymphoblastic leukaemia/lymphoma cells, morphologically and immunohistochemically. An accurate diagnosis assumes particular importance since the treatment approaches for these two entities differ considerably. Multimodality diagnostic approaches incorporating histological, flow cytometry immunophenotypic' and molecular approaches are required. In this article, we describe four patients, each presenting with a mediastinal tumour in different clinicopathological settings. A detailed report of each case will follow, illustrating the challenges involved in the diagnosis in patients with these mediastinal neoplasms.
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Affiliation(s)
- Prajwal Boddu
- Department of Leukemia, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Beenu Thakral
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Ahmed Alhuraiji
- Department of Hematology, Kuwait Cancer Center, Kuwait, Kuwait
| | - Naveen Pemmaraju
- Department of Leukemia, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Tapan Kadia
- Department of Leukemia, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Maro Ohanian
- Department of Leukemia, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Farhad Ravandi
- Department of Leukemia, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Elias Jabbour
- Department of Leukemia, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - William Wierda
- Department of Leukemia, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Joseph D Khoury
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Nitin Jain
- Department of Leukemia, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
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Wenzinger C, Williams E, Gru AA. Updates in the Pathology of Precursor Lymphoid Neoplasms in the Revised Fourth Edition of the WHO Classification of Tumors of Hematopoietic and Lymphoid Tissues. Curr Hematol Malig Rep 2018; 13:275-288. [PMID: 29951888 DOI: 10.1007/s11899-018-0456-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW Acute lymphoblastic leukemias (ALL) are malignant disorders of immature B or T cells that occur characteristically in children, usually under the age of 6 (75%). Approximately 6000 new cases of ALL are diagnosed each year in the USA, 80-85% of which represent B-ALL forms. Most presentations of B-ALL are leukemic, whereas T-ALL presents with a mediastinal mass, with or without leukemic involvement. The revised fourth edition of the World Health Organization (WHO) classification (2017) has introduced some changes in both B and T-ALL. Here, we summarize the categories of lymphoblastic leukemia/lymphomas as defined by the WHO and recent developments in the understanding of this group of hematologic malignancy. RECENT FINDINGS Two provisional categories of B-ALL have now been identified including B-ALL, BCR-ABL1-like, and B-ALL with iAMP21. The Philadelphia chromosome-like B-ALL includes forms of the disease that shares the expression profiling of B-ALL with t(9;22) but lack such rearrangement. The second one shows amplification of part of the chromosome 21. Both entities are associated with worse prognosis. Within the T-ALL group, an early precursor T cell form has now been introduced as a provisional category. Such group demonstrates expression of stem cell and myeloid markers in conjunction with the T cell antigens. The current review summarizes the recent updates to the WHO classification.
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MESH Headings
- Child, Preschool
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, Pair 21/metabolism
- Chromosomes, Human, Pair 9/genetics
- Chromosomes, Human, Pair 9/metabolism
- Female
- Fusion Proteins, bcr-abl/genetics
- Fusion Proteins, bcr-abl/metabolism
- Hematopoiesis
- Humans
- Infant
- Lymphoid Tissue/metabolism
- Lymphoid Tissue/pathology
- Male
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/classification
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/metabolism
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/pathology
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/classification
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/metabolism
- Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/pathology
- Translocation, Genetic
- World Health Organization
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Affiliation(s)
| | - Eli Williams
- Department of Pathology, University of Virginia, Charlottesville, VA, USA
| | - Alejandro A Gru
- Departments of Pathology & Dermatology, University of Virginia, 415 Lane Road, Hospital Expansion Bldg Room 3024, Charlottesville, VA, 22908, USA.
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Chauveau B, Le Loarer F, Bacci J, Baylac F, Dubus P, Ling C, Parrens M. [Indolent T-lymphoblastic proliferation in association with localized Castleman disease: A case report]. Ann Pathol 2018; 39:29-35. [PMID: 30554835 DOI: 10.1016/j.annpat.2018.09.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 07/18/2018] [Accepted: 09/03/2018] [Indexed: 01/09/2023]
Abstract
Herein we report the case of a 41-year-old woman who presented with pelvic pain. Magnetic Resonance Imaging exhibited a single pelvic mass, measuring 50mm long axis, alongside the right iliac vessels. Histological examination of the excision specimen showed a lymphoid tumor with features of localized Castleman disease, hyaline vascular type. Moreover we identified multiple interfollicular dark clusters, composed of cells morphologically resembling cortical thymocytes. Their immunophenotype was consistent with an intermediate stage of T-cell differentiation, with the expression of CD3, CD4, CD8, TdT, CD1a, CD99, CD2, CD5, CD7 and CD10, with 40% Ki67. After integration of clinical and molecular data, the retained diagnosis was an indolent T-cell lymphoblastic proliferation associated with hyaline vascular localized Castleman disease. The clinical course confirmed the indolent nature of the proliferation, despite a late local recurrence at 7 years of the initial diagnosis, without histological modification, due to an incomplete initial resection surgery.
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Affiliation(s)
- Bertrand Chauveau
- Service de pathologie, hôpital Haut-Lévêque, CHU de Bordeaux, avenue Magellan, 33600 Pessac, France; Université de Bordeaux, Campus de Carreire, 146, rue Léo-Saignat CS 61292, 33076 Bordeaux cedex, France.
| | - François Le Loarer
- Service de biopathologie, institut Bergonié, 229, cours de l'Argonne, 33000 Bordeaux, France; Université de Bordeaux, Campus de Carreire, 146, rue Léo-Saignat CS 61292, 33076 Bordeaux cedex, France
| | - Julia Bacci
- Service de biopathologie, institut Bergonié, 229, cours de l'Argonne, 33000 Bordeaux, France
| | - François Baylac
- SCP Lhomme-Baylac-cabinet d'anatomie et cytologie pathologiques, 182, rue de Périgueux, 16000 Angoulême, France
| | - Pierre Dubus
- Université de Bordeaux, Campus de Carreire, 146, rue Léo-Saignat CS 61292, 33076 Bordeaux cedex, France; Service de biologie des tumeurs et tumorothèque, hôpital Haut-Lévêque, CHU de Bordeaux, avenue Magellan, 33600 Pessac, France
| | - Catherine Ling
- Service de pathologie, hôpital Haut-Lévêque, CHU de Bordeaux, avenue Magellan, 33600 Pessac, France; Université de Bordeaux, Campus de Carreire, 146, rue Léo-Saignat CS 61292, 33076 Bordeaux cedex, France
| | - Marie Parrens
- Service de pathologie, hôpital Haut-Lévêque, CHU de Bordeaux, avenue Magellan, 33600 Pessac, France; Université de Bordeaux, Campus de Carreire, 146, rue Léo-Saignat CS 61292, 33076 Bordeaux cedex, France
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Li W, Dim D, Paulson L, Rivard D. Diagnosis of intrathyroidal ectopic thymus in thyroid fine needle aspiration samples. J Clin Pathol 2018; 72:145-151. [DOI: 10.1136/jclinpath-2018-205424] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/27/2018] [Accepted: 10/09/2018] [Indexed: 11/04/2022]
Abstract
AimsIntrathyroidal ectopic thymus (ITET) is a rare cause of paediatric thyroid nodules. Although ultrasonography of ITET demonstrates a characteristic appearance similar to that of normal thymus, accurate differentiation from other thyroid nodule etiologies by ultrasonography is difficult, and so that fine needle aspiration (FNA) is usually performed for further analysis. The aim of this study was to evaluate the utility of flow cytometry (FCM) in confirming the diagnosis of ITET in thyroid FNA samples.MethodsFive cases of ITET were retrieved from our thyroid FNA database within a 3-year period. Their clinical information, ultrasonographic features, cytology and FCM findings were retrospectively reviewed. The FCM results were compared with those of 22 T-cell acute lymphoblastic leukaemia/lymphoblastic lymphoma (T-ALL/LBL) cases.ResultsThe FNA smears of all five ITET cases demonstrated abundant lymphocytes of variable sizes, which included some immature lymphoid cells. No Hassall’s bodies or atypical epithelioid cells were recognised. By multicolour FCM analysis including antibodies against CD1a, CD2, CD3, CD4, CD5, CD7, CD8, CD10, CD34, TDT and TCR, all ITET cases showed antigen expression patterns consistent with normal thymocyte maturation. All T-ALL/LBL cases exhibited significant immunophenotypic aberrancy.ConclusionsThe diagnosis of ITET based on FNA cytology is often inconclusive. The presence of immature lymphocytes often raises the concern for LBL. FCM with adequate antigen coverage can reliably distinguish ITET from T-ALL/LBL and make the diagnosis of ITET in FNA samples. Avoiding unnecessary further invasive procedures, providing reassurance to clinician and patient, the accurate diagnosis of ITET by FCM in FNA samples is clinically important.
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Pizzi M, Brignola S, Righi S, Agostinelli C, Bertuzzi C, Pillon M, Semenzato G, Rugge M, Sabattini E. Benign TdT-positive cells in pediatric and adult lymph nodes: a potential diagnostic pitfall. Hum Pathol 2018; 81:131-137. [PMID: 29969607 DOI: 10.1016/j.humpath.2018.06.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 06/15/2018] [Accepted: 06/18/2018] [Indexed: 12/12/2022]
Abstract
Benign terminal deoxynucleotidyl transferase (TdT)-positive cells have been documented in a variety of nonhematopoietic tissues. Scant data are, however, available on their presence in nonneoplastic lymph nodes. This study is aimed to (1) characterize the presence/distribution of benign TdT-positive cells in pediatric and adult reactive lymph nodes and (2) define the phenotype and nature of such elements. This retrospective study considered 141 reactive lymph nodes from pediatric and adult patients without history of neoplastic disease. TdT-positive cells were characterized by immunohistochemical and morphometric analyses, and their presence was correlated with the clinical-pathological features. The nature of TdT-positive cells was investigated by (1) double immunostaining for early lymphoid cell markers and (2) assessment of TdT expression in fetal lymph nodes. Sparse TdT-positive cells were documented in all pediatric cases and in most (76%) adult lymph nodes. TdT-positive cell density was higher in children than adults (15.9/mm2 versus 8.6/mm2; P < .05). TdT positivity did not correlate with any clinical or histological parameter, and double immunostaining disclosed a phenotype compatible with early lymphoid precursors (positivity for CD34 and CD10, and variable expression of CD7). A very high TdT-positive cell density (802.4/mm2) was reported in all fetal lymph nodes. In conclusion, TdT-positive cells are a common finding in pediatric and adult lymph nodes. The interstitial distribution and low number of such cells allow for the differential diagnosis with precursor lymphoid neoplasms. The high density in fetal lymph nodes and the phenotype of such cells suggest their belonging to an immature lymphoid subset gradually decreasing with age.
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Affiliation(s)
- Marco Pizzi
- General Pathology and Cytopathology Unit, Department of Medicine-DIMED, University of Padova, 35121 Padova, Italy.
| | - Stefano Brignola
- General Pathology and Cytopathology Unit, Department of Medicine-DIMED, University of Padova, 35121 Padova, Italy
| | - Simona Righi
- Haematopathology Unit, Sant'Orsola University Hospital, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, 40138 Bologna, Italy
| | - Claudio Agostinelli
- Haematopathology Unit, Sant'Orsola University Hospital, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, 40138 Bologna, Italy
| | - Clara Bertuzzi
- Haematopathology Unit, Sant'Orsola University Hospital, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, 40138 Bologna, Italy
| | - Marta Pillon
- Clinic of Paediatric Haemato-Oncology, Department of Women's and Children's Health, University of Padova, 35128 Padova, Italy
| | - Gianpietro Semenzato
- Hematology & Clinical Immunology Unit, Department of Medicine-DIMED, University of Padova, 35128 Padova, Italy
| | - Massimo Rugge
- General Pathology and Cytopathology Unit, Department of Medicine-DIMED, University of Padova, 35121 Padova, Italy
| | - Elena Sabattini
- Haematopathology Unit, Sant'Orsola University Hospital, Department of Hematology and Oncology/Department of Experimental Diagnostic and Specialty Medicine, 40138 Bologna, Italy
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Quesada AE, Young KH, Medeiros LJ, Thakral B. Indolent T-lymphoblastic proliferation associated with low grade follicular dendritic cell sarcoma and Castleman disease. Pathology 2018; 50:351-352. [DOI: 10.1016/j.pathol.2017.09.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/27/2017] [Accepted: 09/03/2017] [Indexed: 10/17/2022]
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Nagy A, Bhaduri A, Shahmarvand N, Shahryari J, Zehnder JL, Warnke RA, Mughal T, Ali S, Ohgami RS. Next-generation sequencing of idiopathic multicentric and unicentric Castleman disease and follicular dendritic cell sarcomas. Blood Adv 2018; 2:481-491. [PMID: 29496669 PMCID: PMC5851414 DOI: 10.1182/bloodadvances.2017009654] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 01/30/2018] [Indexed: 02/06/2023] Open
Abstract
Castleman disease (CD) is a rare lymphoproliferative disorder subclassified as unicentric CD (UCD) or multicentric CD (MCD) based on clinical features and the distribution of enlarged lymph nodes with characteristic histopathology. MCD can be further subtyped based on human herpes virus 8 (HHV8) infection into HHV8-associated MCD, HHV8-/idiopathic MCD (iMCD), and polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin change (POEMS)-associated MCD. In a subset of cases of UCD, an associated follicular dendritic cell sarcoma (FDCS) may be seen. Although numerous reports of the clinical and histologic features of UCD, MCD, and FDCS exist, an understanding of the genetic and epigenetic landscape of these rare diseases is lacking. Given this paucity of knowledge, we analyzed 15 cases of UCD and 3 cases of iMCD by targeted next-generation sequencing (NGS; 405 genes) and 3 cases of FDCS associated with UCD hyaline vascular variant (UCD-HVV) by whole-exome sequencing. Common amplifications of ETS1, PTPN6, and TGFBR2 were seen in 1 iMCD and 1 UCD case; the iMCD case also had a somatic DNMT3A L295Q mutation. This iMCD patient also showed clinicopathologic features consistent with a specific subtype known as Castleman-Kojima disease (thrombocytopenia, anasarca, fever, reticulin fibrosis, and organomegaly [TAFRO] clinical subtype). Additionally, 1 case of UCD-HVV showed amplification of the cluster of histone genes on chromosome 6p. FDCS associated with UCD-HVV showed mutations and copy number changes in known oncogenes, tumor suppressors, and chromatin structural-remodeling proteins.
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Affiliation(s)
- Alexandra Nagy
- Department of Pathology, Stanford University, Stanford, CA
| | - Aparna Bhaduri
- Department of Regeneration Medicine, University of California San Francisco, San Francisco, CA
| | | | | | | | - Roger A Warnke
- Department of Pathology, Stanford University, Stanford, CA
| | - Tariq Mughal
- Foundation Medicine Inc, Cambridge, MA; and
- Department of Medicine, Tufts University Medical Center, Boston, MA
| | - Siraj Ali
- Foundation Medicine Inc, Cambridge, MA; and
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Abstract
Patients with PDGFRA-rearranged hematopoietic neoplasms typically present with chronic eosinophilic leukemia and rarely with acute myeloid leukemia or T-lymphoblastic lymphoma. However, mature T-cell lymphoma has not been previously associated with PDGFRA aberrations. We report a patient who presented with simultaneous T-lymphoblastic lymphoma, focal myeloid proliferation, and cutaneous cytotoxic T-cell lymphoma refractory to chemotherapy. The presence of myeloid and lymphoid lineages prompted genetic and molecular studies. A PDGFRA rearrangement was identified in all compartments: cutaneous, lymph node, and bone marrow. Treatment with imatinib resulted in an excellent response in cutaneous and systemic disease. We report the first case of a mature cutaneous T-cell lymphoma with PDGFRA rearrangement, expanding the spectrum of neoplasms associated with this genetic abnormality. Our case underscores the great importance of recognizing PDGFRA rearrangement in unusual cases of cutaneous T-cell lymphoma, systemic lymphoid, and myeloid neoplasms. These patients may respond well to tyrosine kinase inhibitors, despite resistance to conventional chemotherapy.
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Yasuda H, Tsutsui M, Ota Y, Tanaka M, Komatsu N. Indolent T-lymphoblastic proliferation concomitant with acinic cell carcinoma mimicking T-lymphoblastic lymphoma: case report and literature review. Histopathology 2017; 72:862-866. [PMID: 29143359 DOI: 10.1111/his.13433] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/08/2017] [Indexed: 11/28/2022]
Abstract
AIMS Indolent T-lymphoblastic proliferation (iT-LBP) is a non-clonal benign condition showing extrathymic proliferation of T-lymphoblasts positive for CD3, CD4, CD8, and TdT. Isolated iT-LBP has been observed, but the majority of iT-LBPs have been seen in conjunction with other disorders, including Castleman disease, hepatocellular carcinoma, follicular dendritic cell tumours, angioimmunoblastic T-cell lymphoma, myasthenia gravis, and acinic cell carcinoma (ACC). The clinical course of iT-LBP is indolent, and no therapy is usually required. A major concern is misdiagnosis as T-lymphoblastic lymphoma, and a correct diagnosis of iT-LBP often requires not only pathological analysis but also careful monitoring of the clinical course. The aim of this study was to broaden the knowledge of pathologists and physicians concerning this as yet not well-recognised entity. METHODS AND RESULTS We report a case of iT-LBP concomitant with ACC, along with a literature review of all 14 cases of iT-LBP reported to date. CONCLUSIONS iT-LBP should always be considered as a differential diagnosis of T-lymphoblastic lymphoma, as the two disorders show extremely similar traits.
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Affiliation(s)
- Hajime Yasuda
- Department of Haematology, Juntendo University School of Medicine, Tokyo, Japan
| | - Miyuki Tsutsui
- Department of Haematology, Juntendo University School of Medicine, Tokyo, Japan
| | - Yasunori Ota
- Department of Pathology, Research Hospital, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Masaru Tanaka
- Department of Haematology, Juntendo University School of Medicine, Tokyo, Japan
| | - Norio Komatsu
- Department of Haematology, Juntendo University School of Medicine, Tokyo, Japan
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Yuan J, Gali VL, Perry DA, Fu K, Qureishi H, Amador-Ortiz C, Greiner T, Pirruccello SJ. Flow Cytometric Characteristics of Extrathymic Thymocytes in Adenoid Tissue: A Case Report and Comparison to Normal Thymus and Thymoma. CYTOMETRY PART B-CLINICAL CYTOMETRY 2017; 94:357-362. [DOI: 10.1002/cyto.b.21514] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ji Yuan
- Department of Pathology and Microbiology; University of Nebraska Medical Center; Omaha Nebraska
| | - Vasantha L. Gali
- Department of Pathology; Sanford School of Medicine; Sioux Falls Sanford
| | - Deborah A. Perry
- Department of Pathology; Children's Hospital and Medical Center; Omaha Nebraska
| | - Kai Fu
- Department of Pathology and Microbiology; University of Nebraska Medical Center; Omaha Nebraska
| | - Hina Qureishi
- Department of Pathology and Microbiology; University of Nebraska Medical Center; Omaha Nebraska
| | - Catalina Amador-Ortiz
- Department of Pathology and Microbiology; University of Nebraska Medical Center; Omaha Nebraska
| | - Timothy Greiner
- Department of Pathology and Microbiology; University of Nebraska Medical Center; Omaha Nebraska
| | - Samuel J. Pirruccello
- Department of Pathology and Microbiology; University of Nebraska Medical Center; Omaha Nebraska
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Brown NA, Elenitoba-Johnson KSJ. Update from the 4th Edition of the World Health Organization Classification of Head and Neck Tumours: Hematolymphoid Tumours. Head Neck Pathol 2017; 11:96-109. [PMID: 28247223 PMCID: PMC5340738 DOI: 10.1007/s12105-017-0802-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 02/06/2017] [Indexed: 01/13/2023]
Abstract
In 2017, the latest revision to the WHO Classification of Head and Neck Tumours will be released. Similar to the 2005 WHO, the codification of hematopoietic and lymphoid neoplasms of the head and neck is included within chapters pertaining to the nasal cavity and paranasal sinuses, the nasopharynx, the larynx, the oral cavity and oropharynx, the neck and the salivary glands. Herein, we describe both changes to the classification of hematolymphoid neoplasms of the head and neck since the 2005 WHO, as well as recent advances in our understanding of the underlying pathogenesis and molecular pathology of these neoplasms.
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Affiliation(s)
- Noah A Brown
- Department of Pathology, University of Michigan Health System, Ann Arbor, MI, USA
| | - Kojo S J Elenitoba-Johnson
- Department of Pathology, Perelman School of Medicine at University of Pennsylvania, 609A Stellar Chance Laboratories, 420 Curie Boulevard, Philadelphia, PA, 1904, USA.
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Yuan J, Gali VL, Perry DA, Fu K, Qureishi H, Amador-Ortiz C, Greiner T, Pirruccello SJ. Flow cytometric characteristics of extrathymic thymocytes in adenoid tissue: A case report and comparison to normal thymus and thymoma. CYTOMETRY. PART B, CLINICAL CYTOMETRY 2017. [PMID: 28165662 DOI: 10.1002/cyto.b.21516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/21/2016] [Accepted: 12/15/2016] [Indexed: 11/07/2022]
Abstract
BACKGROUND Normal thymocyte precursors in secondary lymphoid organs have previously been described. It is important to recognize normal thymocyte precursors by flow cytometry to differentiate them from T-cell lymphoblastic leukemia. METHODS A 3-year-old boy status 2 years post-allogenic cardiac transplant underwent adenoidectomy to exclude post-transplant lymphoproliferative disorder. Microscopic, immunohistochemical, and flow cytometry analyses of the adenoid were performed. RESULTS By flow cytometry, a population of CD45+(dim)/CD7+(bright)/CD3- cells were observed at 1.0% of lymphocytes. These cells expressed CD10, partial CD34, and exhibited acquisition of CD4 followed by CD8. Within the brighter CD45+ lymphocytes, a population of CD3-/CD4+/CD8+ thymocytes and a similarly sized population of CD4+/CD8+ cells exhibiting acquisition of low-density CD3 were identified. By immunostaining, clusters of TdT+/CD1a+/CD4+/CD8+ T-cells were identified in the interfollicular areas. Compared to normal thymus, thymocytes in the adenoid tissue lacked the classic CD4xCD8 winged differentiation profile but showed a normal early precursor pattern. CONCLUSIONS Thymocytes in adenoid show a similar differentiation pattern to thymus and thymoma. However, the classic winged pattern of common thymocyte differentiation may not be readily apparent in thymocytes differentiating outside of the thymus. Recognition of the early thymocyte precursor antigen acquisition profile can be crucial to correct interpretation. © 2017 International Clinical Cytometry Society.
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Affiliation(s)
- Ji Yuan
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Vasantha L Gali
- Department of Pathology, Sanford School of Medicine, Sioux Falls, South Dakota
| | - Deborah A Perry
- Department of Pathology, Children's Hospital and Medical Center, Omaha, Nebraska
| | - Kai Fu
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Hina Qureishi
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Catalina Amador-Ortiz
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Timothy Greiner
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Samuel J Pirruccello
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
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Wang S, He G. 2016 Revision to the WHO classification of acute lymphoblastic leukemia. J Transl Int Med 2016; 4:147-149. [PMID: 28191537 DOI: 10.1515/jtim-2016-0040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Affiliation(s)
- Shuai Wang
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing 210029, Jiangsu Province, China
| | - Guangsheng He
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing 210029, Jiangsu Province, China
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The 2016 revision to the World Health Organization classification of myeloid neoplasms and acute leukemia. Blood 2016; 127:2391-405. [PMID: 27069254 DOI: 10.1182/blood-2016-03-643544] [Citation(s) in RCA: 6222] [Impact Index Per Article: 777.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 04/06/2016] [Indexed: 02/06/2023] Open
Abstract
The World Health Organization (WHO) classification of tumors of the hematopoietic and lymphoid tissues was last updated in 2008. Since then, there have been numerous advances in the identification of unique biomarkers associated with some myeloid neoplasms and acute leukemias, largely derived from gene expression analysis and next-generation sequencing that can significantly improve the diagnostic criteria as well as the prognostic relevance of entities currently included in the WHO classification and that also suggest new entities that should be added. Therefore, there is a clear need for a revision to the current classification. The revisions to the categories of myeloid neoplasms and acute leukemia will be published in a monograph in 2016 and reflect a consensus of opinion of hematopathologists, hematologists, oncologists, and geneticists. The 2016 edition represents a revision of the prior classification rather than an entirely new classification and attempts to incorporate new clinical, prognostic, morphologic, immunophenotypic, and genetic data that have emerged since the last edition. The major changes in the classification and their rationale are presented here.
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Ohgami RS, Natkunam Y, Warnke RA. Indolent T-lymphoblastic proliferation: a name with specific meaning. Hum Pathol 2015; 46:1785-6. [DOI: 10.1016/j.humpath.2015.07.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 07/27/2015] [Indexed: 11/15/2022]
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Nathwani BN, Kansal R, Yiakoumis X, Pangalis GA. Indolent T-lymphoblastic proliferation: a name with specific meaning—reply. Hum Pathol 2015; 46:1786-7. [DOI: 10.1016/j.humpath.2015.07.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 07/27/2015] [Indexed: 11/29/2022]
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Abstract
Various hematolymphoid lesions involve the sinonasal tract, including aggressive B, T, and NK-cell neoplasms; myeloid sarcoma; low-grade lymphomas; indolent T-lymphoblastic proliferations; and Rosai-Dorfman disease. Differentiating aggressive lymphomas from non-hematopoietic neoplasms such as poorly differentiated squamous cell carcinoma, olfactory neuroblastoma, or sinonasal undifferentiated carcinoma may pose diagnostic challenges. In addition, the necrosis, vascular damage, and inflammatory infiltrates that are associated with some hematolymphoid disorders can result in misdiagnosis as infectious, autoimmune, or inflammatory conditions. Here, we review hematolymphoid disorders involving the sinonasal tract including their key clinical and histopathologic features.
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Affiliation(s)
- Genevieve M Crane
- Department of Pathology, The Johns Hopkins Medical Institutions, Weinberg 2242, 401 N Broadway, Baltimore, Maryland 21231-2410
| | - Amy S Duffield
- Department of Pathology, The Johns Hopkins Medical Institutions, Weinberg 2242, 401 N Broadway, Baltimore, Maryland 21231-2410.
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Abstract
OBJECTIVES To review important concepts from the 2013 Society for Hematopathology/European Association for Haematopathology Workshop session on T-acute lymphoblastic leukemia/T-lymphoblastic lymphoma (T-ALL/T-LBL). METHODS Twenty-one submitted cases are reviewed and summarized, with emphasis on key diagnostic or biologic points, and supplemented with relevant literature citations. RESULTS Early T-cell precursor (ETP)-ALL represented about one-third of all cases submitted. It is important to recognize ETP-ALL, because these patients have a poor prognosis if treated with standard therapy. A consensus immunophenotype has been developed to aid in the recognition of these cases. Other cases submitted illustrated rare entities, including two cases of Philadelphia chromosome-positive T-ALL, two cases of T-ALL associated with MYC translocations, and single cases illustrating various diseases. A subset of cases submitted illustrated issues related to differential diagnosis of T-ALL/T-LBL. CONCLUSIONS In view of the growing importance of molecular genetic analysis in the diagnosis and prognosis of T-ALL/T-LBL, it is important for pathologists to keep abreast of these developments. Currently, routine histopathology, immunophenotyping, conventional cytogenetic analysis, fluorescence in situ hybridization, and clonality testing are usually adequate to establish the diagnosis. However, as therapies become more targeted, assessment for relevant genetic abnormalities, either through candidate gene or broad-scale unbiased approaches, may become necessary.
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Affiliation(s)
- M. James You
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston; and
| | - L. Jeffrey Medeiros
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston; and
| | - Eric D. Hsi
- Department of Clinical Pathology, Cleveland Clinic, Cleveland, OH
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Kansal R, Nathwani BN, Yiakoumis X, Moschogiannis M, Sachanas S, Stefanaki K, Pangalis GA. Exuberant cortical thymocyte proliferation mimicking T-lymphoblastic lymphoma within recurrent large inguinal lymph node masses of localized Castleman disease. Hum Pathol 2015; 46:1057-61. [DOI: 10.1016/j.humpath.2015.03.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 02/08/2015] [Accepted: 03/13/2015] [Indexed: 10/23/2022]
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Woo CG, Huh J. TdT+ T-Lymphoblastic Proliferation in Castleman Disease. J Pathol Transl Med 2015; 49:1-4. [PMID: 25812651 PMCID: PMC4357412 DOI: 10.4132/jptm.2014.11.17] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 10/24/2014] [Accepted: 11/17/2014] [Indexed: 12/03/2022] Open
Affiliation(s)
- Chang Gok Woo
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jooryung Huh
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Indolent T-lymphoblastic proliferation with disseminated multinodal involvement and partial CD33 expression. Am J Surg Pathol 2014; 38:1298-304. [PMID: 24618611 DOI: 10.1097/pas.0000000000000197] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Although indolent T-lymphoblastic proliferations (iT-LBP) are rare, this diagnosis should be excluded in any patient with an extrathymic proliferation of immature TdT+T cells. Unlike T-lymphoblastic leukemia/lymphoma, patients with iT-LBP do not require chemotherapy. We report a case of iT-LBP with disseminated multinodal involvement in an otherwise healthy 49-year-old woman. Multiple lymph node biopsies were performed over the course of several months demonstrating persistent and anatomically diffuse involvement. Over 18 months, and without therapy, she has remained healthy, and her lymphadenopathy significantly improved. No bone marrow or peripheral blood involvement was ever identified. Atypical T cells showed an immunophenotypic spectrum of T-cell antigen expression with partial CD33 on a subset of T cells detected by both flow cytometry and immunohistochemistry. Both T-cell clonality and Human Androgen Receptor Assay (HUMARA) studies, performed on lymph node biopsy specimens, were negative. This case represents the first detailed clinical, morphologic, molecular, and immunophenotypic description of disseminated multinodal involvement by nonclonal iT-LBP with partial CD33 expression on T cells.
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Buscone S, Garavello W, Pagni F, Gaini RM, Cattoretti G. Nasopharyngeal tonsils (adenoids) contain extrathymic corticothymocytes. PLoS One 2014; 9:e98222. [PMID: 24858437 PMCID: PMC4032319 DOI: 10.1371/journal.pone.0098222] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Accepted: 04/29/2014] [Indexed: 11/19/2022] Open
Abstract
Adenoidal tissue (also known as nasopharyngeal tonsils) of 58% of humans in the pediatric age group contains immature T-lymphoid cells with the phenotype of thymocytes (TdT+,CD1abc+, cytoplasmic CD3+, coexpressing CD4 and CD8, lacking an Intraepithelial Lymphocyte-associated phenotype). The notable difference in comparison to palatine tonsils is the clustering in groups and sheets, comprising hundreds or thousands of cells (1.7%±0.2 of total T cells). The thymic epithelium is morphologically and phenotypically absent. Adenoids share with tonsils and lymph nodes the presence of immature B cell precursors (TdT+, CD1a-, Pax5+, Surrogate light chain±), however in these latter the presence of TdT+, CD1a+, Pax5- precursors is absent or limited to individual cells. Human adenoids are distinct among the Waldeyer's ring lymphoid tissue because of the known embryogenic derivation from the third pharyngeal pouch, from which the thymus develops; in addition, they may display phenotypic incomplete features of a vestigial thymus.
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Affiliation(s)
- Serena Buscone
- Anatomic Pathology, Department of Surgery and Translational Medicine, Universitá degli Studi di Milano-Bicocca, Milano, Italy
| | - Werner Garavello
- Otolaryngology, Department of Surgery and Translational Medicine, Universitá degli Studi di Milano-Bicocca, Milano, Italy
| | - Fabio Pagni
- Anatomic Pathology, Department of Surgery and Translational Medicine, Universitá degli Studi di Milano-Bicocca, Milano, Italy
- Pathology, Azienda Ospedaliera San Gerardo, Monza, Italy
| | - Renato Maria Gaini
- Otolaryngology, Department of Surgery and Translational Medicine, Universitá degli Studi di Milano-Bicocca, Milano, Italy
| | - Giorgio Cattoretti
- Anatomic Pathology, Department of Surgery and Translational Medicine, Universitá degli Studi di Milano-Bicocca, Milano, Italy
- Pathology, Azienda Ospedaliera San Gerardo, Monza, Italy
- * E-mail:
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Ohgami RS, Chisholm KM, Ma L, Arber DA. E-cadherin is a specific marker for erythroid differentiation and has utility, in combination with CD117 and CD34, for enumerating myeloblasts in hematopoietic neoplasms. Am J Clin Pathol 2014; 141:656-64. [PMID: 24713736 DOI: 10.1309/ajcp8m4qqtazpgrp] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVES E-cadherin, epithelial calcium-dependent cell adhesion protein, has been identified as a marker of immature erythroid precursors in recent years. However, the specificity of E-cadherin in bone marrow specimens for erythroblasts vs myeloblasts or other early hematopoietic precursors in acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS) has not been fully elucidated. METHODS We analyzed 105 cases of AML and MDS to evaluate the specificity of E-cadherin. RESULTS Of 84 cases of AML, including cases with megakaryocytic, erythroid, monocytic, and granulocytic differentiation, all five acute erythroleukemia cases were positive, as well as one case of megakaryoblastic leukemia that showed coexpression of glycophorin A. In addition, we demonstrate that a panel of three markers, E-cadherin, CD117, and CD34, is effective in identifying lineage-specific myeloblasts in cases of MDS where left-shifted erythroid hyperplasia may complicate morphologic assessment of myeloblasts. CONCLUSIONS In marrow specimens, E-cadherin is a useful marker for erythroid differentation.
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Affiliation(s)
| | | | - Lisa Ma
- Stanford University Medical Center, Stanford CA
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