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Mixed phenotype leukemia

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https://www.readbyqxmd.com/read/29223952/isolated-myeloperoxidase-expression-in-pediatric-b-myeloid-mixed-phenotype-acute-leukemia-is-linked-with-better-survival
#1
Sunil S Raikar, Sunita I Park, Traci Leong, David L Jaye, Frank G Keller, John T Horan, William G Woods
No abstract text is available yet for this article.
December 9, 2017: Blood
https://www.readbyqxmd.com/read/29207878/cd20-cd19-bispecific-car-t-cells-for-the-treatment-of-b-cell-malignancies
#2
Alexandra Martyniszyn, Ann-Christin Krahl, Maya C André, Andreas A Hombach, Hinrich Abken
The treatment of leukemia/lymphoma by chimeric antigen receptor (CAR) redirected T cells with specificity for CD19 induced complete remissions in the majority of patients with a realistic hope for cure. However, recent follow-up data revealed a substantial risk of relapse through leukemic cells which lack the CAR targeted antigen. In this situation a bispecific CAR with binding domains for CD19 and CD20 is aimed at recognizing also leukemic cells with only one cognate antigen. The anti-CD20-CD19 bispecific CAR induced a full T cell response upon engagement of CD19 or CD20 on target cells showing a true "OR" gate recognition in redirecting T cell activation...
December 5, 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/29200701/a-rare-extramedullary-and-extralymphoid-presentation-of-mixed-phenotypic-blastic-hematolymphoid-neoplasm-a-study-of-two-cases
#3
Kiran Ghodke, Prashant Tembhare, Nikhil Patkar, P G Subramanian, Brijesh Arora, Sumeet Gujral
Mixed phenotype acute leukemia (MPAL) is a rare hematolymphoid neoplasm, representing only 3%-5% of acute leukemia. Although MPAL has been sufficiently described in the literature, its extramedullary presentation as a solitary lesion without leukemic (bone marrow [BM]) involvement is rarely described. We are presenting two cases of mixed phenotypic blastic hematolymphoid neoplasms without leukemic involvement at disease presentation in 8-year-old female and 21-year-old male patients. Both the cases had extralymphatic bone involvement in the form of solitary bone lesion...
July 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/29164065/transcriptional-and-microenvironmental-regulation-of-lineage-ambiguity-in-leukemia
#4
REVIEW
Tianyuan Hu, Rebecca Murdaugh, Daisuke Nakada
Leukemia is characterized by the uncontrolled production of leukemic cells and impaired normal hematopoiesis. Although the combination of chemotherapies and hematopoietic stem cell transplantation has significantly improved the outcome of leukemia patients, a proportion of patients still suffer from relapse after treatment. Upon relapse, a phenomenon termed "lineage switch" is observed in a subset of leukemia patients, in which conversion of lymphoblastic leukemia to myeloid leukemia or vice versa is observed...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/29140408/philadelphia-chromosome-like-mixed-phenotype-acute-leukemia-demonstrating-p2ry8-crlf2-fusion-and-jak1-mutation
#5
Sarah M Choi, John K Frederiksen, Charles W Ross, Dale L Bixby, Lina Shao
Objectives: Philadelphia chromosome-like (Ph-like) genetic alterations define a subset of B lymphoblastic leukemia/lymphoma (B-ALL), which represents a separate provisional entity in the World Health Organization 2016 updated classification. However, these alterations have not been described outside the context of B-ALL. Methods: Cytogenomic array and molecular analysis identified a Ph-like signature in a mixed-phenotype acute leukemia (MPAL), B/myeloid, confirmed using conventional immunophenotypic and cytochemical analysis...
November 20, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29137234/the-af4-mll-fusion-transiently-augments-multilineage-hematopoietic-engraftment-but-is-not-sufficient-to-initiate-leukemia-in-cord-blood-cd34-cells
#6
Cristina Prieto, Rolf Marschalek, Alessa Kühn, Adelheid Bursen, Clara Bueno, Pablo Menéndez
The translocation t(4;11)(q21;q23) is the hallmark genetic abnormality associated with infant pro-B acute lymphoblastic leukemia (B-ALL) and has the highest frequency of rearrangement in Mixed-lineage leukemia (MLL) leukemias. Unlike other MLL translocations, MLL-AF4-induced proB-ALL is exceptionally difficult to model in mice/humans. Previous work has investigated the relevance of the reciprocal translocation fusion protein AF4-MLL for t(4;11) leukemia, finding that AF4-MLL is capable of inducing proB-ALL without requirement for MLL-AF4 when expressed in murine hematopoietic stem/progenitor cells (HSPCs)...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29118508/treatment-of-unilateral-zone-i-cytomegalovirus-retinitis-in-acute-lymphoblastic-leukemia-with-oral-valganciclovir-and-intravitreal-ganciclovir
#7
Koushik Tripathy, Kanhaiya Mittal, Pradeep Venkatesh, Sameer Bakhshi, Rohan Chawla
Cytomegalovirus retinitis (CMVR) is an opportunistic infection seen in immunocompromised patients, especially suffering from acquired immune deficiency syndrome. It is uncommonly seen in hematological malignancies and in patients on immunosuppressants. The authors present a 12-year-old girl with unilateral CMVR who was on maintenance phase therapy for mixed phenotype (B/myeloid) leukemia. Serology for human immunodeficiency virus was negative. The child was successfully treated with oral valganciclovir and repeated intravitreal ganciclovir injections...
September 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/29112013/cancer-therapy-associated-lymphoproliferative-disorders-an-under-recognized-type-of-immunodeficiency-associated-lymphoproliferative-disorder
#8
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...
January 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29089646/automated-database-guided-expert-supervised-orientation-for-immunophenotypic-diagnosis-and-classification-of-acute-leukemia
#9
L Lhermitte, E Mejstrikova, A J van der Sluijs-Gelling, G E Grigore, L Sedek, A E Bras, G Gaipa, E S da Costa, M Novakova, E Sonneveld, C Buracchi, T de Sá Bacelar, J G Te Marvelde, A Trinquand, V Asnafi, T Szczepanski, S Matarraz, A Lopez, B Vidriales, J Bulsa, O Hrusak, T Kalina, Q Lecrevisse, M M Ayuso, M Brüggemann, J Verde, P Fernandez, L Burgos, B Paiva, C E Pedreira, J J M van Dongen, A Orfao, V H J van der Velden
Precise classification of acute leukemia (AL) is crucial for adequate treatment. EuroFlow has previously designed an AL orientation tube (ALOT) to guide towards the relevant classification panel (T-cell acute lymphoblastic leukemia (T-ALL), B-cell precursor (BCP)-ALL, and/or acute myeloid leukemia (AML)) and final diagnosis. Now we built a reference database with 656 typical AL samples (145 T-ALL, 377 BCP-ALL, 134 AML), processed and analyzed via standardized protocols. Using principal component analysis (PCA)-based plots and automated classification algorithms for direct comparison of single-cells from individual patients against the database, another 783 cases were subsequently evaluated...
November 1, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29072953/mixed-phenotype-acute-leukemia-diagnostic-criteria-and-pitfalls
#10
REVIEW
Nathan J Charles, Daniel F Boyer
Mixed-phenotype acute leukemia (MPAL) is a heterogeneous category in the World Health Organization classification that comprises acute leukemias with discrete admixed populations of myeloid and lymphoid blasts ("bilineal") or with extensive coexpression of lymphoid and myeloid markers in a single blast population ("biphenotypic"). Flow cytometric findings suggestive of MPAL are often met with consternation by pathologists and oncologists alike, owing to unfamiliarity with the disease and uncertainty about how MPAL fits into established paradigms for treatment of acute leukemia...
November 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/29021517/a-rare-case-of-mixed-phenotype-acute-leukemia-b-t-cell-type
#11
Jain Monica, Mittal Dipali, Shukla Pragya, Jena Nihar
No abstract text is available yet for this article.
2017: Journal of Clinical and Experimental Hematopathology: JCEH
https://www.readbyqxmd.com/read/28971902/mixed-phenotype-acute-leukemia-outcomes-with-allogeneic-stem-cell-transplantation-a-retrospective-study-from-the-acute-leukemia-working-party-of-the-ebmt
#12
Reinhold Munker, Myriam Labopin, Jordi Esteve, Christoph Schmid, Mohamad Mohty, Arnon Nagler
Mixed phenotype acute leukemias are infrequent and considered high-risk. The optimal treatment approach and the role of allogeneic hematopoietic stem cell transplantation are not entirely clear. In this study, we investigated 519 patients with mixed phenotype acute leukemia in first complete remission who underwent allogeneic hematopoietic stem cell transplantation between 2000 and 2014 and were reported to the Acute Leukemia Working Party of the EBMT. The median age was 38.1 years (range 18- 75), by cytogenetics, 49...
September 29, 2017: Haematologica
https://www.readbyqxmd.com/read/28943635/ng2-antigen-is-involved-in-leukemia-invasiveness-and-central-nervous-system-infiltration-in-mll-rearranged-infant-b-all
#13
C Prieto, B López-Millán, H Roca-Ho, R W Stam, D Romero-Moya, F J Rodríguez-Baena, A Sanjuan-Pla, V Ayllón, M Ramírez, M Bardini, P De Lorenzo, M G Valsecchi, M Stanulla, M Iglesias, P Ballerini, Á M Carcaboso, J Mora, F Locatelli, A Bertaina, L Padilla, J Carlos Rodríguez-Manzaneque, C Bueno, P Menéndez
Mixed-lineage leukemia (MLL)-rearranged (MLLr) infant B-cell acute lymphoblastic leukemia (iMLLr-B-ALL) has a dismal prognosis and is associated with a pro-B/mixed phenotype, therapy refractoriness and frequent central nervous system (CNS) disease/relapse. Neuron-glial antigen 2 (NG2) is specifically expressed in MLLr leukemias and is used in leukemia immunophenotyping because of its predictive value for MLLr acute leukemias. NG2 is involved in melanoma metastasis and brain development; however, its role in MLL-mediated leukemogenesis remains elusive...
September 25, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28902076/therapy-related-acute-leukemia-with-mixed-phenotype-and-novel-t-1-6-q25-p23-after-treatment-for-high-risk-neuroblastoma
#14
Sarah B Whittle, Jyotinder N Punia, Dolores López-Terrada, Amos Gaikwad, Oliver A Hampton, Andras Heczey
Neuroblastoma is the most common extracranial malignancy of childhood. Patients with high-risk disease receive multimodal treatment including chemotherapy combinations containing alkylating agents and topoisomerase inhibitors with potential for inducing therapy-related malignancy later in life. Most commonly, cytogenetic changes of pediatric therapy-related myelodysplastic syndrome/acute myeloid leukemia involve chromosome 5 or 7. Here we report a novel case of therapy-related myelodysplastic syndrome/acute myeloid leukemia 30 months after treatment for high-risk neuroblastoma with biphenotypic cell surface markers and a not yet described translocation t(1;6)(q25;p23)...
November 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28882084/genomic-characterization-of-chromosome-translocations-in-patients-with-t-myeloid-mixed-phenotype-acute-leukemia
#15
Aparna Pallavajjala, Daehwan Kim, Tongbin Li, Gabriel Ghiaur, Richard J Jones, Kathleen H Burns, Steven L Salzberg, Yi Ning
Mixed-phenotype acute leukemia (MPAL) is a progenitor type of leukemia with ambiguous expression of lineage markers. The diagnosis of MPAL is based on flow cytometric analysis of immunophenotype, which commonly identifies myeloid lineage markers as well as B- or T- lymphoid lineage markers on leukemic blasts. Due to the rare occurrence of this disease, few studies have delineated the molecular bases of MPAL. Combining conventional karyotyping with whole genomic sequencing (WGS) and RNA sequencing (RNA-seq), we report here our identification and characterization of chromosome translocations, gene mutations and gene expression profile in four patients with T/Myeloid MPAL, including two t(6;14)(q25;q32) one t(8;14)(q24...
September 7, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28805986/histiocytic-sarcoma-new-insights-into-fna-cytomorphology-and-molecular-characteristics
#16
Yin P Hung, Scott B Lovitch, Xiaohua Qian
BACKGROUND: Histiocytic sarcoma (HS) is a rare malignant neoplasm showing morphologic and immunophenotypic features of histiocytes. Molecular characteristics of HS and fine-needle aspiration (FNA) criteria for its diagnosis have not been established. METHODS: A case series of HS in 8 FNA samples from 6 patients was reviewed along with histopathologic and clinical data. Immunohistochemistry was performed on cell blocks (3 cases), core biopsies (5 cases), and surgical specimens (4 cases)...
August 2017: Cancer
https://www.readbyqxmd.com/read/28768245/the-af4-mll-fusion-transiently-augments-multilineage-hematopoietic-engraftment-but-is-not-sufficient-to-initiate-leukemia-in-cord-blood-cd34-cells
#17
Cristina Prieto, Rolf Marschalek, Alessa Kühn, Adelheid Bursen, Clara Bueno, Pablo Menéndez
The translocation t(4;11)(q21;q23) is the hallmark genetic abnormality associated with infant pro-B acute lymphoblastic leukemia (B-ALL) and has the highest frequency of rearrangement in Mixed-lineage leukemia (MLL) leukemias. Unlike other MLL translocations, MLL-AF4-induced proB-ALL is exceptionally difficult to model in mice/humans. Previous work has investigated the relevance of the reciprocal translocation fusion protein AF4-MLL for t(4;11) leukemia, finding that AF4-MLL is capable of inducing proB-ALL without requirement for MLL-AF4 when expressed in murine hematopoietic stem/progenitor cells (HSPCs)...
July 26, 2017: Oncotarget
https://www.readbyqxmd.com/read/28694182/allogeneic-hematopoietic-stem-cell-transplantation-with-myeloablative-conditioning-is-associated-with-favorable-outcomes-in-mixed-phenotype-acute-leukemia
#18
Bartlomiej M Getta, Mikhail Roshal, Junting Zheng, Jae H Park, Eytan M Stein, Ross Levine, Esperanza B Papadopoulos, Ann A Jakubowski, Nancy A Kernan, Peter Steinherz, Richard J O'Reilly, Miguel-Angel Perales, Sergio A Giralt, Martin S Tallman, Brian C Shaffer
Mixed phenotype acute leukemia (MPAL) represents a poorly characterized group of acute leukemias that lack an accepted therapeutic approach and are typically associated with poor outcomes. We present our experience of genomic profiling, pretransplantation therapy, and transplantation outcomes for 36 well-characterized pediatric and adult patients with MPAL, defined according to the 2016 World Health Organization leukemia update. A predominance of acute lymphoid leukemia (ALL)-associated mutations and cytogenetic abnormalities was noted...
November 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28670077/mixed-phenotypic-acute-leukemia-with-leukemia-cutis-and-neuroleukemiosis
#19
Rona Joseph Poikayil, Geetha Narayanan, Harish Sugathan, Lali V Soman
Leukemia cutis and neuroleukemiosis are two rare extramedullary manifestations of acute leukemia. We report a 32-year-old woman with multiple skin lesions and painful peripheral neuropathy. Bone marrow biopsy and skin biopsy confirmed the diagnosis of mixed phenotypic acute leukemia. After induction chemotherapy, she attained marrow remission, her skin lesion resolved completely, and her neurologic symptoms significantly improved.
July 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28663191/the-histone-methyltransferase-mll1-directs-macrophage-mediated-inflammation-in-wound-healing-and-is-altered-in-a-murine-model-of-obesity-and-type-2-diabetes
#20
Andrew S Kimball, Amrita Joshi, William F Carson, Anna E Boniakowski, Matthew Schaller, Ronald Allen, Jennifer Bermick, Frank M Davis, Peter K Henke, Charles F Burant, Steve L Kunkel, Katherine A Gallagher
Macrophages are critical for the initiation and resolution of the inflammatory phase of wound repair. In diabetes, macrophages display a prolonged inflammatory phenotype in late wound healing. Mixed-lineage leukemia-1 (MLL1) has been shown to direct gene expression by regulating nuclear factor-κB (NF-κB)-mediated inflammatory gene transcription. Thus, we hypothesized that MLL1 influences macrophage-mediated inflammation in wound repair. We used a myeloid-specific Mll1 knockout (Mll1(f/f)Lyz2(Cre+) ) to determine the function of MLL1 in wound healing...
September 2017: Diabetes
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