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Splenic B-cell lymphoma

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https://www.readbyqxmd.com/read/29146821/leukemic-presentation-of-diffuse-large-b-cell-lymphoma-an-unusual-pattern-associated-with-splenic-involvement
#1
Genevieve M Crane, Archibald S Perkins
No abstract text is available yet for this article.
November 16, 2017: Blood
https://www.readbyqxmd.com/read/29136691/-tumors-of-lymphoid-and-hematopoietic-tissue-of-spleen-a-clinicopathologic-analysis-of-53-cases
#2
D B Chen, D H Shen, H Zhang, Y Wang, Q J Song, S M Yang, X Z Fang
Objective: To study the clinicopathologic features, diagnosis and differential diagnosis of the tumors of lymphoidand hematopoietic tissue of the spleen(TLTS). Methods: Fifty-three cases of TLTS were selected from the pathologic files from Peking University People's Hospital from April 2002 to April 2017. According to WHO classification of tumors of hematopoietic and lymphoid tissues (2008) and its updated classification (2016), the cases were studied by microscopy, immunohistochemistry and in situ hybridization, combined with the bone marrow biopsy and clinical examination...
November 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29112013/cancer-therapy-associated-lymphoproliferative-disorders-an-under-recognized-type-of-immunodeficiency-associated-lymphoproliferative-disorder
#3
Sergio Pina-Oviedo, Roberto N Miranda, L Jeffrey Medeiros
We describe the clinicopathologic features of 17 patients who had a hematologic malignancy of various types, were treated, and subsequently developed a lymphoproliferative disorder (LPD). There were 10 men and 7 women with a median age of 59 years (range, 36 to 83 y). The primary hematologic neoplasms included: 5 chronic lymphocytic leukemia/small lymphocytic lymphoma, 3 plasma cell myeloma, 2 acute monoblastic leukemia, and 1 case each of mixed-phenotype acute leukemia, chronic myeloid leukemia, splenic marginal zone lymphoma, follicular lymphoma, mantle cell lymphoma, T-cell prolymphocytic leukemia, and peripheral T-cell lymphoma...
November 3, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29110361/hairy-cell-leukemia-2018-update-on-diagnosis-risk-stratification-and-treatment
#4
Xavier Troussard, Edouard Cornet
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 BRAF V600E somatic mutation...
December 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/29043543/surgical-management-of-splenic-marginal-zone-lymphoma
#5
N D Kennedy, G N Lê, M E Kelly, T Harding, K Fadalla, D C Winter
OBJECTIVES: Splenic marginal zone lymphoma (SMZL) is a rare indolent B-cell lymphoma with variable prognosis. As a result, there is sparse knowledge on the role of splenectomy and best management approaches. We aim to explore management strategies and outcomes amongst the cohort of SMZL patients at our centre. METHOD: A retrospective review of all splenectomies performed at a tertiary referral unit over a 23-year period was assessed. Immunohistochemical and pathological results of splenic samples, bone marrow biopsies, and peripheral blood were compiled...
October 17, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29018018/acute-pancreatitis-as-an-unusual-presentation-of-primary-splenic-lymphoma
#6
Elisa Gravito-Soares, Marta Gravito-Soares, José Eduardo Pina-Cabral, Luis Tomé
A 51-year-old man with no relevant medical history presents to the emergency department complaining of a recent worsening of few months upper abdominal pain with back radiation and postprandial fullness, without B symptoms. Laboratory analysis showed hyperamylasaemia, elevated lactate dehydrogenase and inflammatory parameters. Abdominal ultrasonography revealed a heterogeneous solid mass in the spleen/splenic hilum with pancreatic parenchyma continuity and no biliary tract dilation or gallstones. A mild acalculous acute pancreatitis diagnosis was made...
October 10, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28951809/indolent-b-cell-lymphoid-malignancy-in-the-spleen-of-a-man-who%C3%A2-handled-benzene-splenic-marginal-zone-lymphoma
#7
Jihye Lee, Young Joong Kang, Jungho Ahn, Seng-Ho Song
We present the case of a 45-year-old man with a history of benzene exposure who developed splenic marginal zone lymphoma. For 6 years, he had worked in an enclosed space cleaning instruments with benzene. He was diagnosed with splenic marginal zone lymphoma 19 years after retirement. During his time of working in the laboratory in the 1980s, working environments were not monitored for hazardous materials. We indirectly estimated the cumulative level of past benzene exposure using job-exposure matrices and technical assumptions...
September 2017: Safety and Health At Work
https://www.readbyqxmd.com/read/28939756/efficient-induction-of-ig-gene-hypermutation-in-ex-vivo-activated-primary-b-cells
#8
Jun Liu, Ermeng Xiong, Hanying Zhu, Hiromi Mori, Shoya Yasuda, Kazuo Kinoshita, Takeshi Tsubata, Ji-Yang Wang
Activation-induced cytidine deaminase (AID) initiates both somatic hypermutation (SHM) and class switch recombination (CSR) of Ig genes. How AID is targeted to the Ig V gene and switch region to trigger SHM and CSR remains elusive. Primary B cells stimulated with CD40L plus IL-4 or LPS plus IL-4 undergo efficient CSR, but it has been difficult to induce SHM in these cells. In the current study, we used B cells from B1-8(hi) mice carrying a prerecombined VH186.2DFL16.1JH2 Ab gene to investigate the induction of SHM under in vitro culture conditions...
November 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28902958/nonregenerative-immune-mediated-anemia-associated-with-a-diffuse-large-b-cell-lymphoma-in-a-captive-jaguar-panthera-onca
#9
Monika A Keresztes, Manfred Henrich, Penelope Baloi, Sascha Gerst, Jens-Christian Rudnick, Judith Langenstein, Andreas Moritz, Natali Bauer
An 18-year-old male castrated jaguar (Panthera onca) was presented with anorexia and continuous bleeding from the oral cavity after a history of fighting with the partner animal. Clinical evaluation revealed ulcerating lesions on the gingiva and hard palate and a hematoma on the tongue. Computed tomography of the head and endoscopic examination of the esophagus and stomach were unremarkable. Hematology and clinical chemistry revealed severe nonregenerative anemia, mild thrombocytopenia, and moderate azotemia...
September 13, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28892912/important-diagnostic-clues-for-diagnosing-splenic-marginal-zone-lymphoma-in-absence-of-splenic-histology
#10
Anisha Mohanpuria, Vijay Kumar, Pooja Suteri, Sadhna Marwah, Abhay Shankar Nigam
Splenic Marginal Zone Lymphoma (SMZL) is a rare B-cell neoplasm comprising less than 2% of non-Hodgkin lymphomas. We hereby report a case of SMZL in a 66-year-old female who presented with fever and massive splenomegaly. Peripheral blood smear examination showed atypical lymphoid cells showing variable cytoplasmic processes. Flowcytometric immunophenotyping of peripheral blood showed tumour cells which were found to be positive for CD19, CD79b and showing kappa light chain restriction along with lack of expression for CD5, CD10, CD23, CD103 and lambda...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892161/a-gene-is-known-by-the-company-it-keeps-enrichment-of-tnfaip3-gene-aberrations-in-malt-lymphomas-expressing-ighv4-34-antigen-receptors
#11
Andreas Agathangelidis, Aliki Xochelli, Kostas Stamatopoulos
Associations between immunoglobulin (IG) receptors with distinctive immunogenetic features and particular gene mutations are a recurring theme in mature B-cell lymphomas. Relevant observations have been made in chronic lymphocytic leukemia (CLL), where gene mutations are distributed asymmetrically in cases bearing or not somatic hypermutations within the clonotypic immunoglobulin heavy chain variable region (IGHV) genes (e.g. TP53 mutations predominate in IG-unmutated CLL, whereas the opposite is seen for MYD88 mutations, enriched in IG-mutated CLL) and in subsets of cases with stereotyped IG (enrichment for SF3B1 mutations in CLL subset #2)...
September 11, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28830605/quantitative-flow-cytometric-evaluation-of-cd200-cd123-cd43-and-cd52-as-a-tool-for-the-differential-diagnosis-of-mature-b-cell-neoplasms
#12
Elissandra Machado Arlindo, Natália Aydos Marcondes, Flavo Beno Fernandes, Gustavo Adolpho Moreira Faulhaber
BACKGROUND: Distinction between mature B-cell neoplasms can be difficult due to overlapping of immunologic features and clinical manifestations. This study investigated whether quantifying mean fluorescence intensity of four monoclonal antibodies in a flow cytometry panel is useful for the differential diagnosis and characterization of these disorders. METHODS: The expressions of CD52, CD200, CD123 and CD43 were analyzed in samples from 124 patients with mature B-cell neoplasms...
July 2017: Revista Brasileira de Hematologia e Hemoterapia
https://www.readbyqxmd.com/read/28811815/hepatosplenic-mucormycosis-post-autologous-stem-cell-transplant
#13
Samia Yasmeen, Omer Waqas, Javeria Munir, Faisal Sultan, Abdul Hameed
Mucormycosis is a life threatening fungal infection and remains an important cause of morbidity and mortality in immunocompromised patients after hematopoietic stem cell transplant. We report here a case of hepatosplenic mucormycosis in a patient after autologous stem cell transplant. A young man with anaplastic large cell lymphoma underwent autologous hematopoietic stem cell transplant after achieving complete remission with standard chemotherapy and consolidative radiotherapy. He was found to have incidental hepatosplenic hypodensities on follow up imaging, that were proved to be mucormycosis on histopathology after getting CT-guided biopsy of splenic lesions...
May 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28807996/klhl6-deficiency-impairs-transitional-b-cell-survival-and-differentiation
#14
Barbara Bertocci, Damiana Lecoeuche, Delphine Sterlin, Julius Kühn, Baptiste Gaillard, Annie De Smet, Frederique Lembo, Christine Bole-Feysot, Nicolas Cagnard, Tatiana Fadeev, Auriel Dahan, Jean-Claude Weill, Claude-Agnès Reynaud
Klhl6 belongs to the KLHL gene family, which is composed of an N-terminal BTB-POZ domain and four to six Kelch motifs in tandem. Several of these proteins function as adaptors of the Cullin3 E3 ubiquitin ligase complex. In this article, we report that Klhl6 deficiency induces, as previously described, a 2-fold reduction in mature B cells. However, we find that this deficit is centered on the inability of transitional type 1 B cells to survive and to progress toward the transitional type 2 B cell stage, whereas cells that have passed this step generate normal germinal centers (GCs) upon a T-dependent immune challenge...
October 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28806244/lymphoma-causing-gastrosplenic-fistula-revealed-by-fdg-pet-ct
#15
Trent P Wang, Mohan Doss, Jeffrey L Tokar, Sanjay Reddy, Stefan K Barta, Jian Q Yu
A 73-year-old man presented with fatigue and weight loss. He had CT-proven splenic mass with fistulous connection to the greater curvature of the stomach, which suggested abscess. FDG PET/CT confirmed gastrosplenic fistula in addition to active lymph nodes in the gastrohepatic ligament and epigastric region. Pathological examination after the biopsy of the spleen was consistent with diffuse large B-cell lymphoma. Chemotherapy was administered with close clinical follow-up and resulted in the resolution of fistula without requirement for surgery...
August 12, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28762504/computed-tomographic-findings-in-12-cases-of-canine-multi-centric-lymphoma-with-splenic-and-hepatic-involvement
#16
I D Jones, A D Daniels, A Lara-Garcia, L M Peters, P Mantis
OBJECTIVES: To describe the CT findings in a population of dogs with multi-centric lymphoma that involved the spleen and liver. MATERIALS AND METHODS: Clinical records between January 2008 and June 2015 were reviewed. Thoracic and abdominal CT examinations of patients diagnosed with multi-centric lymphoma were evaluated by a board-certified radiologist. A diagnosis of multi-centric lymphoma with splenic and hepatic involvement was based upon cytological identification and immunophenotyping of neoplastic lymphocytes in cellular samples harvested from a peripheral lymph node, the spleen and the liver...
August 1, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28752619/spectrum-and-immunophenotyping-of-653-patients-with-b-cell-chronic-lymphoproliferative-disorders-in-china-a-single-centre-analysis
#17
Yi Miao, Lei Cao, Qian Sun, Xiao-Tong Li, Yan Wang, Chun Qiao, Li Wang, Rong Wang, Hai-Rong Qiu, Wei Xu, Jian-Yong Li, Yu-Jie Wu, Lei Fan
The incidence of B-cell chronic lymphoproliferative disorders (B-CLPDs) is significantly lower in China than that in western countries. There have been studies involving small cohorts with conflicting results regarding the spectrum of B-CLPDs in China, and the types and immunophenotyping of B-CLPDs in China remain largely unexplored. We conducted a retrospective analysis of 653 cases of B-CLPDs seen in our centre from 2011 to 2015. Four-colour flow cytometry was used to determine the expression of each immunological marker, and the diagnostic values of the immunological markers were also investigated...
July 28, 2017: Hematological Oncology
https://www.readbyqxmd.com/read/28751561/exome-sequencing-identifies-recurrent-bcor-alterations-and-the-absence-of-klf2-tnfaip3-and-myd88-mutations-in-splenic-diffuse-red-pulp-small-b-cell-lymphoma
#18
Laurent Jallades, Lucile Baseggio, Pierre Sujobert, Sarah Huet, Kaddour Chabane, Evelyne Callet-Bauchu, Aurélie Verney, Sandrine Hayette, Jean-Pierre Desvignes, David Salgado, Nicolas Levy, Christophe Béroud, Pascale Felman, Françoise Berger, Jean-Pierre Magaud, Laurent Genestier, Gilles Salles, Alexandra Traverse-Glehen
Splenic diffuse red pulp lymphoma is an indolent small B-cell lymphoma recognized as a provisional entity in the World Health Organization 2008 classification. Its precise relationship to other related splenic B-cell lymphomas with frequent leukemic involvement or other lymphoproliferative disorders remains undetermined. We performed whole-exome sequencing to explore the genetic landscape of ten cases of splenic diffuse red pulp lymphoma using paired tumor and normal samples. A selection of 109 somatic mutations was then evaluated in a cohort including 42 samples of splenic diffuse red pulp lymphoma and compared to those identified in 46 samples of splenic marginal zone lymphoma and eight samples of hairy-cell leukemia...
October 2017: Haematologica
https://www.readbyqxmd.com/read/28724724/brct-domain-protein-brit1-influences-class-switch-recombination
#19
Wei-Feng Yen, Ashutosh Chaudhry, Bharat Vaidyanathan, William T Yewdell, Joseph N Pucella, Rahul Sharma, Yulong Liang, Kaiyi Li, Alexander Y Rudensky, Jayanta Chaudhuri
DNA double-strand breaks (DSBs) serve as obligatory intermediates for Ig heavy chain (Igh) class switch recombination (CSR). The mechanisms by which DSBs are resolved to promote long-range DNA end-joining while suppressing genomic instability inherently associated with DSBs are yet to be fully elucidated. Here, we use a targeted short-hairpin RNA screen in a B-cell lymphoma line to identify the BRCT-domain protein BRIT1 as an effector of CSR. We show that conditional genetic deletion of BRIT1 in mice leads to a marked increase in unrepaired Igh breaks and a significant reduction in CSR in ex vivo activated splenic B cells...
July 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28701397/b-cell-specific-expression-of-ataxia-telangiectasia-mutated-protein-kinase-promotes-chronic-gammaherpesvirus-infection
#20
Eric J Darrah, Joseph M Kulinski, Wadzanai P Mboko, Gang Xin, Laurent P Malherbe, Stephen B Gauld, Weiguo Cui, Vera L Tarakanova
Manipulation of host cellular pathways is a strategy employed by gammaherpesviruses, including mouse gammaherpesvirus 68 (MHV68), in order to negotiate a chronic infection. Ataxia-telangiectasia mutated (ATM) plays a unique yet incompletely understood role in gammaherpesvirus infection, as it has both proviral and antiviral effects. Chronic gammaherpesvirus infection is poorly controlled in a host with global ATM insufficiency, whether the host is a mouse or a human. In contrast, ATM facilitates replication, reactivation, and latency establishment of several gammaherpesviruses in vitro, suggesting that ATM is proviral in the context of infected cell cultures...
October 1, 2017: Journal of Virology
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