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https://www.readbyqxmd.com/read/29327711/cd3-positive-plasmablastic-b-cell-neoplasms-a-diagnostic-pitfall
#1
Zenggang Pan, Mingyi Chen, Qianyun Zhang, Endi Wang, Liqun Yin, Youyuan Xu, Qin Huang, Youzhong Yuan, Xiaohui Zhang, Gang Zheng, Ji Yuan
Rare B-cell neoplasms with plasmablastic differentiation may aberrantly express CD3 by immunohistochemical staining, which places a great challenge for diagnosis. We here studied 17 cases of CD3+ plasmablastic B-cell neoplasms, including 12 plasmablastic lymphomas and 5 plasmablastic plasma cell myelomas. All 17 cases occurred in the extranodal sites with a male predominance (13/17). Four cases were initially misinterpreted by outside institutions, among which three were diagnosed as 'peripheral T-cell lymphoma, not otherwise specified' and one was classified as 'poorly differentiated neuroendocrine carcinoma'...
January 12, 2018: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/29325279/-characteristics-of-igh-cdr3-repertoire-of-peripheral-b-cells-in-a-patient-with-primary-biliary-cholangitis-a-preliminary-study-using-high-throughput-sequencing
#2
D T Zhao, C L Guo, H P Yan, H Y Liao, Y M Liu, H P Zhang, L S An, C Y Huang, Y Han, Y Zhao
Objective: To analyze the characteristics of immunoglobulin heavy chain complementarity-determining region (IgH-CDR3) repertoire of peripheral B cells in a patient with primary biliary cholangitis (PBC) and to investigate the diversity of the immune system. Methods: Arm-PCR was used to amplify the IgH-CDR3 region of circulating B cells isolated from a PBC patient, and high-throughput sequencing was used to analyze the amplified product. The characteristics of immune repertoire were analyzed by bioinformatics...
November 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29325245/-clinical-characteristics-of-high-grade-b-cell-lymphomas-with-rearrangement-of-myc-bcl-6-and-bcl-2
#3
J Y Gong, Y Z Zhang, J D Zhang, W Zhang, J Q Li, K Ru, E B Liu
Objective: To investigate the clinicopathologic features of patients with high-grade B-cell lymphomas (HGBL) that have rearrangements of MYC, bcl-6 and bcl-2. Methods: One hundred and fifty-eight B-cell lymphomas patients from Institute of Hematology and Blood Diseases Hospital from January 2016 to April 2017 were detected by fluorescence in situ hybridization (FISH) with double color split-apart probes. Results: Among 158 B-cell lymphomas, 3 cases with MYC, bcl-2 and bcl-6 rearrangements were identified, 1 of which also had CCND1/IgH translocation...
January 8, 2018: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29314206/follicular-lymphoma-2018-update-on-diagnosis-and-management
#4
Arnold Freedman
DISEASE OVERVIEW: Follicular lymphoma is generally an indolent B cell lymphoproliferative disorder of transformed follicular center B cells. Follicular lymphoma (FL) is characterized by diffuse lymphadenopathy, bone marrow involvement, splenomegaly and less commonly other extranodal sites of involvement. In general, cytopenias can occur but constitutional symptoms of fever, nightsweats, and weight loss are uncommon. DIAGNOSIS: Diagnosis is based on histology of preferably a biopsy of a lymph node...
February 2018: American Journal of Hematology
https://www.readbyqxmd.com/read/29314151/comparison-of-ebv-positive-mucocutaneous-ulcer-ebvmcu-associated-with-treated-lymphoma-or-methotrexate-in-japan
#5
Teerada Daroontum, Kei Kohno, Ahmed E Eladl, Akira Satou, Ayako Sakakibara, Shoichi Matsukage, Naoki Yakushiji, Charin Ya-In, Shigeo Nakamura, Naoko Asano, Seiichi Kato
AIMS: The present study compared treated lymphoma-associated EBV-positive mucocutaneous ulcer (EBVMCU) and methotrexate (MTX)-associated EBVMCU. METHODS AND RESULTS: Of a series of 15 Japanese patients (11 women, 4 men; median age 74 years, range 35-84 years). 7 received MTX for autoimmune disease and 8 developed EBVMCU after treatment of malignant lymphoma (diffuse large B-cell lymphoma [n=4] without EBV association, adult T-cell leukaemia/lymphoma [n=2], angioimmunoblastic T-cell lymphoma [n=1], and follicular lymphoma [n=1])...
January 4, 2018: Histopathology
https://www.readbyqxmd.com/read/29311308/dna-double-strand-break-response-factors-influence-end-joining-features-of-igh-class-switch-and-general-translocation-junctions
#6
Rohit A Panchakshari, Xuefei Zhang, Vipul Kumar, Zhou Du, Pei-Chi Wei, Jennifer Kao, Junchao Dong, Frederick W Alt
Ig heavy chain (IgH) class switch recombination (CSR) in B lymphocytes switches IgH constant regions to change antibody functions. CSR is initiated by DNA double-strand breaks (DSBs) within a donor IgH switch (S) region and a downstream acceptor S region. CSR is completed by fusing donor and acceptor S region DSB ends by classical nonhomologous end-joining (C-NHEJ) and, in its absence, by alternative end-joining that is more biased to use longer junctional microhomologies (MHs). Deficiency for DSB response (DSBR) factors, including ataxia telangiectasia-mutated (ATM) and 53BP1, variably impair CSR end-joining, with 53BP1 deficiency having the greatest impact...
January 8, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29310838/a-leukemic-double-hit-follicular-lymphoma-associated-with-a-complex-variant-translocation-t-8-14-18-q24-q32-q21-involving-bcl2-myc-and-igh
#7
Daisuke Minakata, Kazuya Sato, Takashi Ikeda, Yumiko Toda, Shoko Ito, Kiyomi Mashima, Kento Umino, Hirofumi Nakano, Ryoko Yamasaki, Kaoru Morita, Yasufumi Kawasaki, Miyuki Sugimoto, Chihiro Yamamoto, Masahiro Ashizawa, Kaoru Hatano, Iekuni Oh, Shin-Ichiro Fujiwara, Ken Ohmine, Hirotoshi Kawata, Kazuo Muroi, Ikuo Miura, Yoshinobu Kanda
Double-hit lymphoma (DHL) is defined as lymphoma with concurrent BCL2 and MYC translocations. While the most common histological subtype of DHL is diffuse large B-cell lymphoma, the present patient had leukemic follicular lymphoma (FL). A 52-year-old man was admitted to our hospital due to general fatigue and cervical and inguinal lymph node swelling. The patient was leukemic and the pathological diagnosis of the inguinal lymph node was FL grade 1. Chromosomal analysis revealed a complex karyotype including a rare three-way translocation t(8;14;18)(q24;q32;q21) involving the BCL2, MYC, and IGH genes...
January 2018: Cancer Genetics
https://www.readbyqxmd.com/read/29296973/high-throughput-sequencing-of-the-b-cell-receptor-in-african-burkitt-lymphoma-reveals-clues-to-pathogenesis
#8
Katharine A Lombardo, David G Coffey, Alicia J Morales, Christopher S Carlson, Andrea M H Towlerton, Sarah E Gerdts, Francis K Nkrumah, Janet Neequaye, Robert J Biggar, Jackson Orem, Corey Casper, Sam M Mbulaiteye, Kishor G Bhatia, Edus H Warren
Burkitt lymphoma (BL), the most common pediatric cancer in sub-Saharan Africa, is a malignancy of antigen-experienced B lymphocytes. High-throughput sequencing (HTS) of the immunoglobulin heavy (IGH) and light chain (IGK/IGL) loci was performed on genomic DNA from 51 primary BL tumors: 19 from Uganda and 32 from Ghana. Reverse transcription polymerase chain reaction analysis and tumor RNA sequencing (RNAseq) was performed on the Ugandan tumors to confirm and extend the findings from the HTS of tumor DNA. Clonal IGH and IGK/IGL rearrangements were identified in 41 and 46 tumors, respectively...
March 28, 2017: Blood Advances
https://www.readbyqxmd.com/read/29284596/measurable-residual-disease-detection-by-high-throughput-sequencing-improves-risk-stratification-for-pediatric-b-all
#9
Brent Wood, David Wu, Beryl Crossley, Yunfeng Dai, David Williamson, Charles Gawad, Michael J Borowitz, Meenakshi Devidas, Kelly W Maloney, Eric Larsen, Naomi Winick, Elizabeth Raetz, William L Carroll, Stephen P Hunger, Mignon Loh, Harlan Robins, Ilan Kirsch
Early response to induction chemotherapy is an important prognostic factor in B lymphoblastic leukemia (B-ALL). Here, we compare high throughput sequencing (HTS) of IGH and TRG genes versus flow cytometry (FC) for measurable residual disease (MRD) detection at the end of induction chemotherapy in pediatric patients with newly diagnosed B-ALL. 619 paired pretreatment and end of induction bone marrow samples from Children's Oncology Group (COG) studies AALL0331 (clinicaltrials.gov NCT00103285) (standard-risk; SR with MRD by FC at any level) and AALL0232 (clinicaltrials...
December 28, 2017: Blood
https://www.readbyqxmd.com/read/29279478/ebv-positive-reactive-hyperplasia-progressed-into-ebv-positive-diffuse-large-b-cell-lymphoma-of-the-elderly-over-a-6-year-period
#10
Akane Kunitomi, Yuta Hasegawa, Naoko Asano, Seiichi Kato, Takashi Tokunaga, Yasuhiko Miyata, Hiroatsu Iida, Hirokazu Nagai
A 70-year-old woman with lymphadenopathy was admitted to hospital in 2008. Lymph node biopsy showed reactive lymphoid hyperplasia (RH) with monoclonal proliferation of EBV. Her lymphadenopathy regressed without treatment. In 2014, the patient presented with nasal obstruction because of a left nasal mass. She was diagnosed with EBV-positive diffuse large B-cell lymphoma (DLBCL) of the elderly based on the examination of a biopsy specimen of the mass. The IgH rearrangement in the specimens from the 2008 and the 2014 revealed that they were genetically identical...
December 27, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29273915/cyclin-d1-mrna-as-a-molecular-marker-for-minimal-residual-disease-monitoring-in-patients-with-mantle-cell-lymphoma
#11
M Lokvenc, Marketa Kalinova, K Forsterova, P Klener, M Trneny, E Fronkova, R Kodet
Chromosomal translocation t(11;14)(q13;q32) is a characteristic molecular marker of mantle cell lymphoma (MCL) and leads to the fusion of the immunoglobulin heavy chain enhancer-promoter with the cyclin D1 gene. Both aberrant cyclin D1 expression and underlying chromosomal aberration may be used as molecular targets for monitoring minimal residual disease (MRD). The present study aims to assess the usefulness of quantitative cyclin D1 gene expression compared to the standardised but more technologically demanding DNA-based method for immunoglobulin heavy chain (IGH) or t(11;14) clone-specific gene rearrangement quantification in a cohort of bone marrow (BM) and peripheral blood (PB) samples from patients with MCL...
December 22, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/29273402/an-algorithm-for-the-classification-of-mrna-patters-in-eosinophilic-esophagitis-integration-of-machine-learning
#12
Benjamin F Sallis, Lena Erkert, Sherezade Moñino-Romero, Utkucan Acar, Rina Wu, Liza Konnikova, Willem S Lexmond, Matthew J Hamilton, W Augustine Dunn, Zsolt Szepfalusi, Jon A Vanderhoof, Scott B Snapper, Jerrold R Turner, Jeffrey D Goldsmith, Lisa A Spencer, Samuel Nurko, Edda Fiebiger
BACKGROUND: Diagnostic evaluation of eosinophilic esophagitis (EoE) remains difficult, particularly the assessment of the patient's allergic status. OBJECTIVE: Establish an automated medical algorithm to assist in the evaluation of EoE. METHODS: Machine learning techniques were used to establish a diagnostic probability score for EoE (pEoE) based on esophageal mRNA transcript patterns from biopsies of patients with EoE, gastroesophageal reflux disease, and controls...
December 19, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29258765/clinicopathologic-features-of-adult-ebv-associated-b-cell-lymphoproliferative-disease
#13
Sonja Wörner, Hans-Konrad Mueller-Hermelink, Hans-Ullrich Voelker
In the present study, 21 cases of adult/late-onset EBV-associated lymphoproliferative disease (AELPD) with an uncertain malignant potential were investigated with regard to their histomorphology, immunophenotype, clonal rearrangement of the heavy chain (IgH) and T-cell receptor (TCR) genes and clinical course. The cases were histomorphologically reevaluated and assigned to one of three morphological groups: mononucleosis-like, Hodgkin-like, or polymorphous. In addition, cases with or without detectable necrosis were investigated for differences in clinical outcome...
December 16, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29247044/stochasticity-enables-bcr-independent-germinal-center-initiation-and-antibody-affinity-maturation
#14
Jared Silver, Teng Zuo, Neha Chaudhary, Rupa Kumari, Pei Tong, Sophie Giguere, Alessandra Granato, Rakesh Donthula, Colby Devereaux, Duane R Wesemann
Two immunoglobulin (Ig) diversification mechanisms collaborate to provide protective humoral immunity. Combinatorial assembly of IgH and IgL V region exons from gene segments generates preimmune Ig repertoires, expressed as B cell receptors (BCRs). Secondary diversification occurs when Ig V regions undergo somatic hypermutation (SHM) and affinity-based selection toward antigen in activated germinal center (GC) B cells. Secondary diversification is thought to only ripen the antigen-binding affinity of Igs that already exist (i...
December 15, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29246583/dna-structural-basis-for-fragility-at-peak-iii-of-bcl2-major-breakpoint-region-associated-with-t-14-18-translocation
#15
Saniya Javadekar, Rakhee Yadav, Sathees C Raghavan
Maintaining genome integrity is crucial for normal cellular functions. DNA double-strand breaks (DSBs), when unrepaired, can potentiate chromosomal translocations. t(14;18) translocation involving BCL2 gene on chromosome 18 and IgH loci at chromosome 14, could lead to follicular lymphoma. Molecular basis for fragility of translocation breakpoint regions is an active area of investigation. Previously, formation of non-B DNA structures like G-quadruplex, triplex, B/A transition were investigated at peak I of BCL2 major breakpoint region (MBR); however, it is less understood at peak III...
December 12, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29242186/biased-igh-vdj-gene-repertoire-and-clonal-expansions-in-b-cells-of-chronically-hepatitis-c-virus-infected-individuals
#16
Felicia A Tucci, Simo Kitanovski, Patricia Johansson, Ludger Klein-Hitpass, Alisan Kahraman, Jan Dürig, Daniel Hoffmann, Ralf Küppers
Patients chronically infected with hepatitis C virus (HCV) frequently develop mixed cryoglobulinemia (MC), a monoclonal expansion of IgM+ autoreactive B cells, and also have an increased B cell lymphoma risk. Whether HCV infection also impacts the B cell compartment and the B cell receptor repertoire in patients not affected by MC or lymphomas is poorly understood. Flow cytometric analysis of peripheral blood B cells of 30 MC-negative HCV-infected patients and 15 healthy controls revealed that frequencies of class-switched memory B cells were increased in the patients, whereas frequencies of transitional and naive B cells were decreased...
December 14, 2017: Blood
https://www.readbyqxmd.com/read/29232859/competitive-promoter-associated-matrix-attachment-region-binding-of-the-arid3a-and-cux1-transcription-factors
#17
Dongkyoon Kim, Christian Schmidt, Mark A Brown, Haley Tucker
Arid3a/Bright/Dril1 is a B cell-specific transactivator that regulates immunoglobulin heavy chain (IgH) gene transcription by binding promoter and enhancer-associated matrix attachment regions (MARs) within the IgH gene locus. Promoter MAR-mediated Arid3a transactivation is antagonized by direct competition of MAR binding by Cux1/CDP-a ubiquitously expressed repressor originally termed NF-μNR. We report that the NF-μNR complex includes Arid3a in B cells but not in non-B cells through mobility shift assays...
December 10, 2017: Diseases (Basel)
https://www.readbyqxmd.com/read/29228725/distinct-clinical-characteristics-draw-a-new-prognostic-model-for-splenic-marginal-zone-lymphoma-in-hbv-high-prevalent-region
#18
Shuhua Yi, Yuting Yan, Wenjie Xiong, Rui Lv, Zhen Yu, Wei Liu, Enbin Liu, Heng Li, Huimin Liu, Zengjun Li, Gang An, Yan Xu, Kun Ru, Dehui Zou, Lugui Qiu
Splenic marginal zone lymphoma (SMZL) is a rare indolent B-cell neoplasm with hepatitis virus supposed to involve in the pathogenesis. The characteristics of SMZL derived from Caucasia population and high hepatitis C virus (HCV) infection region have been widely investigated, but few was reported in the Eastern population with HBV prevalent region. We analyzed the clinical characteristics, cytogenetic aberrations and prognostic factors in 160 SMZL patients from China. 25 patients (16%) were HBsAg-positive and 54 (34%) patients with resolved HBV infection...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29217426/composite-lymphoma-of-follicular-b-cell-and-peripheral-t-cell-types-with-distinct-zone-distribution-in-a-75-year-old-male-patient-a-case-study
#19
John Tanaka, Pu Su, Catherine Luedke, Rachel Jug, Lian-He Yang, Kristen Deak, Sarah Horn, Yang Zhang, Marc Delos Angeles, Yi Xie, Endi Wang
Composite lymphoma (CL) of T-/B-cell type is rare, and follicular lymphoma composite with peripheral T-cell lymphoma (PTCL) has not previously been reported. We report such a case with both neoplastic components displaying a unique zone of distribution. A 75-year-old male patient presented with generalized lymphadenopathy. Sections of axillary lymph node demonstrated potentially two clonal processes, PTCL with aberrant CD20 expression and follicular lymphoma. Interestingly, the two neoplastic components were confined to their respective classic distribution zones, with PTCL occupying the interfollicular areas and follicular lymphoma residing in follicles...
December 4, 2017: Human Pathology
https://www.readbyqxmd.com/read/29206983/cytogenetic-profiling-of-myelomas-association-with-complete-blood-count-study-of-180-patients
#20
Anil Tarigopula, Vani Chandrashekar, Perumal Govindasamy
Objectives: To analyze the most common primary and secondary cytogenetic events in myelomas using a probe panel designed in our laboratory, and to associate those events with hematological and biochemical findings. Methods: Blood specimens from patients diagnosed with myeloma were processed to determine complete blood count and levels of albumin, creatinine, and beta-2 microglobulin. We evaluated bone-marrow specimens for plasma-cell percentage by light microscopy and for cytogenetic abnormalities by fluorescence in situ hybridization (FISH)...
December 1, 2017: Laboratory Medicine
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