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Mixed phenotype leukemia

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https://www.readbyqxmd.com/read/28805986/histiocytic-sarcoma-new-insights-into-fna-cytomorphology-and-molecular-characteristics
#1
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
#2
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
#3
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...
July 8, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28670077/mixed-phenotypic-acute-leukemia-with-leukemia-cutis-and-neuroleukemiosis
#4
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
#5
Andrew Kimball, Amrita Joshi, William F Carson, Anna Boniakowski, Frank Davis, Matthew Schaller, Ronald Allen, Jennifer Bermick, 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. Recently, Mixed-Lineage Leukemia-1 (MLL1) has been shown to direct gene expression by regulating NFκB-mediated inflammatory gene transcription. Thus, we hypothesized that MLL1 influences macrophage-mediated inflammation in wound repair. We utilized a myeloid-specific Mll1 knockout(Mll1(f/f)Lyz2(Cre+) ) to determine the function of MLL1 in wound healing...
June 29, 2017: Diabetes
https://www.readbyqxmd.com/read/28625325/importance-of-cd117-in-the-assignation-of-a-myeloid-lineage-in-acute-leukemias
#6
Alan Pomerantz, Sergio Rodríguez-Rodríguez, Roberta Demichelis-Gómez, Georgina Barrera-Lumbreras, Olga V Barrales-Benítez, María José Díaz-Huízar, Monica Goldberg-Murow, Xavier López-Karpovitch, Álvaro Aguayo
The correct classification of acute leukemias (AL) is an essential part in the evaluation of any patient with this disease. Historically, CD117 has been an important asset in the diagnosis of patients with mixed-phenotype acute leukemia (MPAL). In an attempt to simplify the diagnosis of MPAL with fewer and more lineage specific markers, the World Health Organization (WHO) proposed in 2008 a new criteria for the diagnosis of this type of AL, which excluded CD117 from the myeloid markers that are utilized to diagnose MPAL...
February 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28607179/phf6-regulates-phenotypic-plasticity-through-chromatin-organization-within-lineage-specific-genes
#7
Yadira M Soto-Feliciano, Jordan M E Bartlebaugh, Yunpeng Liu, Francisco J Sánchez-Rivera, Arjun Bhutkar, Abraham S Weintraub, Jason D Buenrostro, Christine S Cheng, Aviv Regev, Tyler E Jacks, Richard A Young, Michael T Hemann
Developmental and lineage plasticity have been observed in numerous malignancies and have been correlated with tumor progression and drug resistance. However, little is known about the molecular mechanisms that enable such plasticity to occur. Here, we describe the function of the plant homeodomain finger protein 6 (PHF6) in leukemia and define its role in regulating chromatin accessibility to lineage-specific transcription factors. We show that loss of Phf6 in B-cell leukemia results in systematic changes in gene expression via alteration of the chromatin landscape at the transcriptional start sites of B-cell- and T-cell-specific factors...
May 15, 2017: Genes & Development
https://www.readbyqxmd.com/read/28551327/t-cell-transcription-factor-gata-3-is-an-immunophenotypic-marker-of-acute-leukemias-with-t-cell-differentiation
#8
David M Dorfman, Elizabeth A Morgan, Ashley Pelton, Christine Unitt
T cell transcription factor GATA-3, known to play a role in early T cell development and in the development of T cell neoplasms, is expressed at high levels in fetal and adult thymus, as well as in acute leukemias with T-cell differentiation, including T lymphoblastic leukemia/lymphoma (22/22 cases), early T cell precursor (ETP) lymphoblastic leukemia (11/11 cases), and mixed phenotype acute leukemia, T/myeloid (4/5 cases), but only rarely in acute myeloid leukemia/myeloid sarcoma (1/36 cases), and not in B lymphoblastic leukemia (0/16 cases)...
May 24, 2017: Human Pathology
https://www.readbyqxmd.com/read/28540857/an-unusual-case-of-acute-leukemia
#9
Carole Fleury, Marie Passet, Catherine Settegrana, Laurence Simon, Elise Chapiro, Amélie Trinquand, Ines Safra Zaghouani, Madalina Uzunov, Magali Le Garff-Tavernier, Marine Armand, Myrto Costopoulos
We report the case of a 31 year-old man diagnosed with an atypical acute leukemia difficult to characterize cytologically. The immunophenotyping identified a blastic population co-expressing myeloid, lymphoid B and lymphoid T markers suggesting the diagnosis of either a mixed phenotype acute leukemia (MPAL) or an early T-cell precursor acute lymphoblastic leukemia (ETP-ALL). Because of the poor prognosis linked to these leukemias, the patient benefited from chemotherapy targeting both myeloid and lymphoid components, followed by allogeneic hematopoietic stem cell transplantation...
June 1, 2017: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/28494052/association-of-minimal-residual-disease-with-clinical-outcome-in-pediatric-and-adult-acute-lymphoblastic-leukemia-a-meta-analysis
#10
Donald A Berry, Shouhao Zhou, Howard Higley, Lata Mukundan, Shuangshuang Fu, Gregory H Reaman, Brent L Wood, Gary J Kelloff, J Milburn Jessup, Jerald P Radich
Importance: Minimal residual disease (MRD) refers to the presence of disease in cases deemed to be in complete remission by conventional pathologic analysis. Assessing the association of MRD status following induction therapy in patients with acute lymphoblastic leukemia (ALL) with relapse and mortality may improve the efficiency of clinical trials and accelerate drug development. Objective: To quantify the relationships between event-free survival (EFS) and overall survival (OS) with MRD status in pediatric and adult ALL using publications of clinical trials and other databases...
July 13, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28459703/novel-cytogenetic-findings-in-a-case-of-mixed-phenotype-acute-leukemia-within-the-context-of-a-complex-karyotype
#11
David Shabsovich, Gary Schiller, Yalda Naeini, Robert Collins, Carlos A Tirado
BACKGROUND: Mixed phenotype acute leukemia (MPAL) is a rare hematological malignancy characterized by combinatorial aberrations involving cells of the myeloid, T-, and/or B- lineages, most often diagnosed by means of immunophenotyping in order to assess lineage-specific markers, which can still yield inconclusive diagnoses. MPAL with a complex karyotype (three or more chromosomal abnormalities) is a cytogenetic subtype of MPAL associated with a poor prognosis, but limited data is available about the cytogenetic abnormalities present in this context...
2017: Journal of the Association of Genetic Technologists
https://www.readbyqxmd.com/read/28453885/lineage-switch-under-blinatumomab-treatment-of-relapsed-common-acute-lymphoblastic-leukemia-without-mll-rearrangement
#12
Annabelle Zoghbi, Udo Zur Stadt, Beate Winkler, Ingo Müller, Gabriele Escherich
Blinatumomab is a bispecific T-cell engaging αCD19 antibody used in refractory or relapsed B-cell precursor acute lymphoblastic leukemia (ALL). Recently, lineage switch to a myeloid phenotype has been described following CD19 targeting treatment in three pediatric patients with mixed lineage leukemia (MLL) rearranged ALL. We report the case of a female who received blinatumomab for a first relapse of ALL without MLL alterations. She suffered from a second relapse early after hematopoietic stem cell transplantation and was treated with blinatumomab again...
April 28, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28422191/mixed-phenotype-acute-leukemia-state-of-the-art-of-the-diagnosis-classification-and-treatment
#13
Martin Cernan, Tomas Szotkowski, Zuzana Pikalova
Mixed-phenotype acute leukemia (MPAL) is a heterogeneous group of hematopoietic malignancies in which blasts show markers of multiple developmental lineages and cannot be clearly classified as acute myeloid or lymphoblastic leukemias. Historically, various names and classifications were used for this rare entity accounting for 2-5% of all acute leukemias depending on the diagnostic criterias used. The currently valid classification of myeloid neoplasms and acute leukemia published by the World Health Organization (WHO) in 2016 refers to this group of diseases as MPAL...
April 18, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28396764/mixed-phenotype-acute-leukemia-with-t-9-22-success-with-nonacute-myeloid-leukemia-type-intensive-induction-therapy-and-stem-cell-transplantation
#14
Onyee Chan, Abdur Rehman Jamil, Rebecca Millius, Ramandeep Kaur, Faiz Anwer
Mixed phenotype acute leukemia with t(9;22) is a rare disease with poor prognosis, and information on optimal treatment is limited. We describe a case where our patient experienced positive outcome after nonacute myeloid leukemia-type intensive induction therapy followed by postremission therapy with stem cell transplant.
April 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28379418/histoplasmosis-in-pleural-effusion-in-a-23-year-old-man-with-mixed-phenotype-acute-leukemia
#15
Sudha Sharma, Priya Singh, Kamal Kant Sahu, Arvind Rajwanshi, Pankaj Malhotra, Shano Naseem
Histoplasmosis has been observed in patients with immunosuppression in the form of isolated pulmonary involvement and disseminated disease. However, very few cases of this type that involved pleural effusion have been reported, and none have been reported in a case individual with mixed-phenotype acute leukemia (MPAL). Herein, we report a case involving a 23 year old Punjabi man having fever and breathlessness in the postinduction therapy period for mixed-phenotype acute leukemia (MPAL) with diagnosis of histoplasmosis based on the results of pleural fluid cytologic testing...
April 1, 2017: Laboratory Medicine
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
#16
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/28195090/mixed-phenotypic-acute-leukemia-series-from-tertiary-care-center
#17
Ravikiran N Pawar, Sambhunath Banerjee, Subhajit Bramha, Shekhar Krishnan, Arpita Bhattacharya, Vaskar Saha, Anupam Chakrapani, Saurabh Bhave, Mammen Chandy, Reena Nair, Mayur Parihar, Neeraj Arora, D K Mishra
INTRODUCTION: Mixed-phenotype acute leukemias (MPALs) are a heterogeneous group of rare leukemias constituting approximately 2%-5% of all leukemias, in which assigning a single lineage of origin is not possible. They are diagnosed by either the presence of antigens of more than one lineage or by the presence of dual population of blasts belonging to two or more lineages. We highlight the clinicopathological, immunophenotype, and genetic data of a cohort (n = 14) of patients diagnosed and treated at our center...
January 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28187514/aieop-bfm-consensus-guidelines-2016-for-flow-cytometric-immunophenotyping-of-pediatric-acute-lymphoblastic-leukemia
#18
Michael N Dworzak, Barbara Buldini, Giuseppe Gaipa, Richard Ratei, Ondrej Hrusak, Drorit Luria, Eti Rosenthal, Jean-Pierre Bourquin, Mary Sartor, Angela Schumich, Leonid Karawajew, Ester Mejstrikova, Oscar Maglia, Georg Mann, Wolf-Dieter Ludwig, Andrea Biondi, Martin Schrappe, Giuseppe Basso
Immunophenotyping by flow cytometry (FCM) is a worldwide mainstay in leukemia diagnostics. For concordant multicentric application, however, a gap exists between available classification systems, technologic standardization, and clinical needs. The AIEOP-BFM consortium induced an extensive standardization and validation effort between its nine national reference laboratories collaborating in immunophenotyping of pediatric acute lymphoblastic leukemia (ALL). We elaborated common guidelines which take advantage of the possibilities of multi-color FCM: marker panel requirements, immunological blast gating, in-sample controls, tri-partite antigen expression rating (negative vs...
February 10, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28099272/mixed-phenotype-acute-leukemia-current-challenges-in-diagnosis-and-therapy
#19
Ofir Wolach, Richard M Stone
PURPOSE OF REVIEW: Mixed-phenotype acute leukemia (MPAL) is a rare disease that poses many diagnostic and therapeutic challenges. Patients with MPAL are considered to have poor outcomes. The difficulties in classifying this leukemia, the lack of prospectively collected data concerning therapeutic outcomes, and rare incidence result in much uncertainty as to the best approach for patients with MPAL. RECENT FINDINGS: Recent studies demonstrated that most MPALs are associated with cytogenetic abnormalities; genetic sequencing studies disclose a high frequency of somatic mutations in genes encoding epigenetic regulators, tumor suppressors, and transcription factors...
March 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28095364/acute-myeloid-leukemia-with-myelodysplasia-related-changes-demonstrating-mixed-lineage-phenotype
#20
Babita Kajal, Hong Chang
No abstract text is available yet for this article.
September 22, 2016: Blood
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