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https://www.readbyqxmd.com/read/28426555/creating-artificial-lymphoid-tissues-to-study-immunity-and-hematological-malignancies
#1
Shivem B Shah, Ankur Singh
PURPOSE OF REVIEW: The specialized microenvironments of lymphoid tissue affect immune cell function and progression of disease. However, current animal models are low throughput and a large number of human diseases are difficult to model in animals. Animal models are less amenable to manipulation of tissue niche components, signalling pathways, epigenetics, and genome editing than ex vivo models. On the other hand, conventional 2D cultures lack the physiological relevance to study precise microenvironmental interactions...
April 19, 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28405080/myeloid-sarcoma-causing-airway-obstruction
#2
Aaron R Belknap, John R Krause
Myeloid sarcoma is an extramedullary collection of blasts of the myeloid series that partially or totally effaces the architecture of the tissue in which it is found. These tumors have been described in many sites of the body, but the skin, lymph nodes, gastrointestinal tract, bone, soft tissue, and testes are most common. They can arise in a patient following the diagnosis of acute myeloid leukemia, but they may also be precursors of leukemia and should be considered diagnostic for acute myeloid leukemia. The differential diagnosis of this neoplasm includes malignant lymphoma, with which it is often mistaken, leading to diagnostic and therapeutic delays...
April 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28395058/diagnostic-utility-of-lymphoid-enhancer-binding-factor-1-immunohistochemistry-in-small-b-cell-lymphomas
#3
Thomas Menter, Pritesh Trivedi, Raida Ahmad, Rashpal Flora, Stephan Dirnhofer, Alexandar Tzankov, Kikkeri N Naresh
Objectives: Recent studies have shown that lymphoid enhancer binding factor 1 (LEF1) is a useful marker for chronic lymphocytic B-cell leukemia (CLL)/small lymphocytic lymphoma. Yet, it is not still being widely used in a diagnostic setting. In this study, we document the experience with LEF1 immunohistochemistry during routine diagnostics. Methods: In total, 191 B-cell lymphoma cases from Hammersmith Hospital, Imperial College NHS Healthcare Trust (London, UK) were investigated by immunohistochemistry for LEF1 during routine diagnostic workup...
March 1, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28360415/hiv-tat-induces-a-prolonged-myc-relocalization-next-to-igh-in-circulating-b-cells
#4
D Germini, T Tsfasman, M Klibi, R El-Amine, A Pichugin, O V Iarovaia, C Bilhou-Nabera, F Subra, Y Bou Saada, A Sukhanova, D Boutboul, M Raphaël, J Wiels, S V Razin, S Bury-Moné, E Oksenhendler, M Lipinski, Y S Vassetzky
With combined antiretroviral therapy (cART), the risk for HIV-infected individuals to develop a non-Hodgkin lymphoma is diminished. However, the incidence of Burkitt lymphoma (BL) remains strikingly elevated. Most BL present a t(8;14) chromosomal translocation which must take place at a time of spatial proximity between the translocation partners. The two partner genes, MYC and IGH, were found colocalized only very rarely in the nuclei of normal peripheral blood B-cells examined using 3D-FISH while circulating B-cells from HIV-infected individuals whose exhibited consistently elevated levels of MYC-IGH colocalization...
April 25, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28302939/concurrent-with-t-zone-lymphoma-and-high-grade-gastrointestinal-cytotoxic-t-cell-lymphoma-in-a-dog
#5
Akihisa Suwa, Tetsuya Shimoda
A 9-year-old, spayed female Golden Retriever dog was referred to us for lymphocytosis and lymphadenopathy, secondary to suspected chronic lymphocytic leukemia (CLL). The dog had a clinical history of anorexia, vomiting and melena lasting two days. The popliteal lymph node contained small-to-intermediate lymphocytes, which led us to suspect low-grade lymphoma. Thickened lesions in the stomach and small intestine were detected by ultrasonography. Histopathology of the popliteal lymph node and small intestine revealed a simultaneous presence of T-zone lymphoma (TZL) and high-grade gastrointestinal (GI) cytotoxic T-cell lymphoma...
April 8, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28291392/new-molecular-assay-for-the-proliferation-signature-in-mantle-cell-lymphoma-applicable-to-formalin-fixed-paraffin-embedded-biopsies
#6
David W Scott, Pau Abrisqueta, George W Wright, Graham W Slack, Anja Mottok, Diego Villa, Pedro Jares, Hilka Rauert-Wunderlich, Cristina Royo, Guillem Clot, Magda Pinyol, Merrill Boyle, Fong Chun Chan, Rita M Braziel, Wing C Chan, Dennis D Weisenburger, James R Cook, Timothy C Greiner, Kai Fu, German Ott, Jan Delabie, Erlend B Smeland, Harald Holte, Elaine S Jaffe, Christian Steidl, Joseph M Connors, Randy D Gascoyne, Andreas Rosenwald, Louis M Staudt, Elias Campo, Lisa M Rimsza
Purpose Mantle cell lymphoma is an aggressive B-cell neoplasm that displays heterogeneous outcomes after treatment. In 2003, the Lymphoma/Leukemia Molecular Profiling Project described a powerful biomarker-the proliferation signature-using gene expression in fresh frozen material. Herein, we describe the training and validation of a new assay that measures the proliferation signature in RNA derived from routinely available formalin-fixed paraffin-embedded (FFPE) biopsies. Methods Forty-seven FFPE biopsies were used to train an assay on the NanoString platform, using microarray gene expression data of matched fresh frozen biopsies as a gold standard...
March 14, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28272651/subcutaneous-leiomyosarcoma-metastasized-to-the-lymph-nodes-involved-with-small-lymphocytic-lymphoma-chronic-lymphocytic-leukemia
#7
Ayfer Kamali Polat, Atilla Soran, Amal Kanbour-Shakir, Howard Edington
Herein, we present a case of a 76-year-old Caucasian man with a very large fungating, ulcerating mass, involving the right neck and parotid area, which developed while he was being treated for chronic lymphocytic leukemia/small lymphocytic lymphoma. Resection of the fungating right neck tumor, right modified radical neck dissection, and right superficial parotidectomy with flap reconstruction were performed. The final pathological diagnosis was high-grade leiomyosarcoma of the skin and the subcutaneous tissue, with invasion into the skeletal muscle, skin, and soft tissue...
February 4, 2017: Türk Patoloji Dergisi
https://www.readbyqxmd.com/read/28261866/morphologic-and-immunophenotypic-features-of-hairy-cell-leukemia-involving-lymph-nodes-and-extranodal-tissues
#8
Jacqueline M Cortazar, Daniel J DeAngelo, Geraldine S Pinkus, Elizabeth A Morgan
Hairy cell leukemia (HCL) is a rare B-cell neoplasm that mainly affects bone marrow (BM), peripheral blood (PB), and spleen. Involvement of lymph nodes and extranodal structures is considered infrequent. Herein we describe our institutional experience of nodal (n=10) and extranodal (n=3) HCL over a thirty-year period. Ten patients had prior evidence of HCL within the BM or PB at a median 35.8 months before nodal/extranodal diagnosis (range, <1 to 175 months), and HCL was diagnosed concurrently within the bone marrow of 1 additional patient...
March 6, 2017: Histopathology
https://www.readbyqxmd.com/read/28251608/adult-t-cell-leukemia-lymphoma-in-a-peruvian-hospital-in-human-t-lymphotropic-virus-type-1-htlv-1-positive-patients
#9
Milton José Max Rodríguez-Zúñiga, Florencio Cortez-Franco, Eberth Qujiano-Gomero
BACKGROUND: Adult T-cell leukemia/lymphoma (ATLL) is an aggressive neoplasm of T-lymphocytes associated with human T-lymphotropic virus type I (HTLV-1) infection. As HTLV-1 is endemic in native ethnics in South America, and its infection leads to several chronic diseases as ATLL with poor prognosis, we aimed to present three ATLL cases and to review current literature. CASE REPORTS: Two cases were from the mountains of Peru, while one was from an endemic harbor of the country...
March 2, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28242986/mixed-phenotypic-acute-leukemia-mixed-myeloid-b-cell-with-myeloid-sarcoma-of-the-thyroid-gland-a-rare-entity-with-rarer-asssociation-detected-on-fdg-pet-ct
#10
Gaurav Khanna, Nishikant Avinash Damle, Shipra Agarwal, Maitrayee Roy, Deepali Jain, Soumyaranjan Mallick, Shamim Ahmed, Madhavi Tripathi, Ajay Gogia
Mixed phenotypic acute leukemia (MPAL) is a rare clinical entity. MPAL associated with myeloidsarcoma (MS) is still rarer with only three cases mentioned in English literature. MS has been described in myriads of location, most commonly in skin, gums and lymph nodes. Although theoritically possible, it is very rare to find MS involving the thyroid gland. The diagnosis of MS can be elusive, very often masquerades and mislabeled as lymphoma. A high index of clinical suspicion coupled with PET/CT findings along with morphological clues and thorough peripheral blood, and bone marrow evaluation is mandatory for arriving at the definitive diagnosis...
January 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28192408/macrophages-confer-survival-signals-via-ccr1-dependent-translational-mcl-1-induction-in-chronic-lymphocytic-leukemia
#11
M H A van Attekum, S Terpstra, E Slinger, M von Lindern, P D Moerland, A Jongejan, A P Kater, E Eldering
Protective interactions with bystander cells in micro-environmental niches, such as lymph nodes (LNs), contribute to survival and therapy resistance of chronic lymphocytic leukemia (CLL) cells. This is caused by a shift in expression of B-cell lymphoma 2 (BCL-2) family members. Pro-survival proteins B-cell lymphoma-extra large (BCL-XL), BCL-2-related protein A1 (BFL-1) and myeloid leukemia cell differentiation protein 1 (MCL-1) are upregulated by LN-residing T cells through CD40L interaction, presumably via nuclear factor (NF)-κB signaling...
February 13, 2017: Oncogene
https://www.readbyqxmd.com/read/28105149/t-14-18-q32-q21-in-chronic-lymphocytic-leukemia-patients-report-of-two-cases-and-a-literature-review
#12
Weifeng Chen, Yi Miao, Rong Wang, Yujie Wu, Hairong Qiu, Wei Xu, Jianyong Li, Lei Fan, Xin Xu
The chromosomal abnormality t(14;18)(q32;q21) is most commonly associated with germinal center-derived B-cell lymphomas, particularly follicular lymphoma (FL). Generally, it is considered a hallmark of FL. The t(14;18)(q32;q21) translocation is rare in chronic lymphocytic leukemia (CLL) and its prognostic significance remains unclear. In the present study, two cases of CLL with t(14;18)(q32;q21) were diagnosed using conventional cytogenetic analysis and fluorescence in situ hybridization. Both patients presented with leukemia and the morphological features and immunophenotypes were typical of CLL...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28075522/crucial-role-of-carbonic-anhydrase-ix-in-tumorigenicity-of-xenotransplanted-adult-t-cell-leukemia-derived-cells
#13
Kentaro Nasu, Kazunori Yamaguchi, Tomoka Takanashi, Keiichi Tamai, Ikuro Sato, Shoji Ine, Osamu Sasaki, Kennichi Satoh, Nobuyuki Tanaka, Yuetsu Tanaka, Takuya Fukushima, Hideo Harigae, Kazuo Sugamura
Carbonic anhydrase IX (CA9) is a membrane-associated carbonic anhydrase that regulates cellular pH, is upregulated in various solid tumors, and is considered to be a therapeutic target. Here, we describe the essential role of CA9 in the tumorigenicity of cells derived from human adult T-cell leukemia/lymphoma (ATL). We previously established the highly tumorigenic ST1-N6 subline from the ATL-derived ST1 cell line by serial xenotransplantation in NOG mice. In the present study, we first show that CA9 expression is strongly enhanced in ST1-N6 cells...
March 2017: Cancer Science
https://www.readbyqxmd.com/read/28056298/-significance-of-cxcl12-cxcr4-expression-in-t-lymphoblastic-lymphoma-leukemia
#14
Z Z Yu, Y F Xi, J Li, W Q Bai, N Gao, P Bu
Objective: To investigate the significance of CXCL12/CXCR4 expression in T lymphoblastic lymphoma/leukemia (T-LBL/ALL) and its prognostic significance. Methods: Using immunohistochemical EnVision method, CXCL12, CXCR4 and Ki-67 expression were evaluated in 72 cases of T-LBL/ALL and 30 selected cases of lymph node reactive hyperplasia (LH) as control. In addition, CXCL12 and CXCR4 mRNA expression levels were examined by real-time reverse transcription polymerase chain reaction (real-time RT-PCR) method. Results: Immunohistochemical results showed that the expression rates of CXCL12 and CXCR4 in T-LBL/ALL were 84...
December 8, 2016: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28034804/whole-body-clonality-analysis-in-an-aggressive-stlv-1-associated-leukemia-atll-reveals-an-unexpected-clonal-complexity
#15
Jocelyn Turpin, Sandrine Alais, Ambroise Marçais, Julie Bruneau, Anat Melamed, Nicolas Gadot, Yuetsu Tanaka, Olivier Hermine, Sandrine Melot, Romain Lacoste, Charles R Bangham, Renaud Mahieux
HTLV-1 causes Adult T cell Leukemia/Lymphoma (ATLL) in humans. We describe an ATL-like disease in a 9 year-old female baboon naturally infected with STLV-1 (the simian counterpart of HTLV-1), with a lymphocyte count over 10(10)/L, lymphocytes with abnormal nuclear morphology, and pulmonary and skin lesions. The animal was treated with a combination of AZT and alpha interferon. Proviral load (PVL) was measured every week. Because the disease continued to progress, the animal was euthanized. Abnormal infiltrates of CD3(+)CD25(+) lymphocytes and Tax-positive cells were found by histological analyses in both lymphoid and non-lymphoid organs...
December 26, 2016: Cancer Letters
https://www.readbyqxmd.com/read/28025076/unusual-extramedullary-hematopoietic-neoplasms-in-lymph-nodes
#16
REVIEW
Vanessa D Dayton, Sarah J Williams, Robert W McKenna, Michael A Linden
Myeloid, plasma cell, and lymphoblastic neoplasms are expected findings in bone marrow but are much less commonly diagnosed as primary processes in lymph nodes. The objective of this review is to aid pathologists in recognizing common hematopoietic neoplasms in the unusual setting of initial presentation in lymph nodes. Review of historical background and evolution of testing strategies is presented to improve understanding of the need for accurate diagnosis and classification using current nomenclature. The review is based on peer-reviewed literature and the personal experience of the authors...
April 2017: Human Pathology
https://www.readbyqxmd.com/read/28024492/-analysis-of-indicators-related-with-cell-proliferation-and-apoptosis-in-the-patients-with-b-cell-non-hodgkin-s-lymphoma
#17
Jue-Jie Yin, Bo Liang, Yi Lu, Xin-Rong Zhan
OBJECTIVE: To analyze the indicators related with cell proliferation and apoptosis in patients with B cell non-Hodgkin's lymphoma(B-NHL). METHODS: Seventy-two cases of B-NHL and 50 cases of reactive hyperplasia of lymph nodes were entrolled in the experimental group and control group respectively. The expression levels of proliferating cell nuclear antigen(PCNA), X-linked inhibitor of apoptosis(XIAP) and B cell lymphoma leukemia-2(BCL-2) in paraffin-embedded tissue samples of 2 groups were detected by immuno-histochemistry staining, and their ralationship with pathologic factors was analyzed...
December 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/27917497/acquired-factor-xiii-inhibitor-associated-with-mantle-cell-lymphoma
#18
Christian P Nixon, Elizabeth H Prsic, Christine A Guertin, Ryan L Stevenson, Joseph D Sweeney
BACKGROUND: Acquired Factor (F)XIII deficiency is a very rare bleeding diathesis with a potentially fatal outcome, previously described in the context of autoimmune disorders and leukemias. There is minimal information on autoantibody characterization and the role of antifibrinolytic therapy in patient management. CASE REPORT: A 79-year-old woman with a 3-month history of bruising and heavy menorrhagia presented with ongoing vaginal bleeding, symptomatic anemia, and a right thigh hematoma...
March 2017: Transfusion
https://www.readbyqxmd.com/read/27910030/recurrent-cytogenetic-abnormalities-in-non-hodgkin-s-lymphoma-and-chronic-lymphocytic-leukemia
#19
Edmond S K Ma
Characteristic chromosomal translocations are found to be associated with subtypes of B-cell non-Hodgkin lymphoma (NHL), for example t(8;14)(q24;q32) and Burkitt lymphoma, t(14;18)(q32;q21) and follicular lymphoma, and t(11;14)(q13;q32) in mantle cell lymphoma. Only few recurrent cytogenetic aberrations have been identified in the T-cell NHL and the best known is the ALK gene translocation t(2;5)(p23;q35) in anaplastic large cell lymphoma. Since lymph node or other tissue is seldom submitted for conventional cytogenetics study, alternative approaches for translocation detection are polymerase chain reaction (PCR) or fluorescence in situ hybridization (FISH)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27905140/herpes-simplex-infection-simulating-richter-transformation-a-series-of-four-cases-and-review-of-the-literature
#20
Alireza Salem, Sanam Loghavi, Joseph D Khoury, Rose Lou Marie C Agbay, Jeffrey L Jorgensen, L Jeffrey Medeiros
AIMS: Richter transformation (RT) occurs in 5-10% of patients with chronic lymphocytic leukaemia/small lymphocytic lymphoma (CLL/SLL), and is associated with a poor outcome. The histological manifestations of RT are variable, and include an increase in the proportion of prolymphocytes, immunoblasts, and other pleomorphic cells, along with an increased proliferation rate and often necrosis. Rarely, superimposed herpes simplex virus (HSV) infection involving lymph nodes in patients with CLL/SLL may mimic RT clinically and histologically...
April 2017: Histopathology
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