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leukemia myelomonocytic

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https://www.readbyqxmd.com/read/28442268/generalized-palisaded-neutrophilic-and-granulomatous-dermatitis-a-cutaneous-manifestation-of-chronic-myelomonocytic-leukemia-a-clinical-histopathological-and-molecular-study-of-three-cases
#1
Birgit Federmann, Irina Bonzheim, Amir S Yazdi, Janine Schmidt, Falko Fend, Gisela Metzler
Palisaded neutrophilic and granulomatous dermatitis (PNGD) is characterized by erythematous papules or plaques on trunk or limbs and is frequently associated with rheumatological, autoimmune or hematological malignancies. Histopathology shows interstitial granulomas composed of epitheloid histiocytes in the reticular dermis with surrounding foci of collagen degeneration and variable neutrophilic inflammation. We report three cases of generalized PNGD associated with chronic myelomonocytic leukemia (CMML), a myelodysplastic/myeloproliferative neoplasm, which may show a variety of cutaneous manifestations...
April 22, 2017: Human Pathology
https://www.readbyqxmd.com/read/28419882/novel-homozygous-fancl-mutation-and-somatic-heterozygous-setbp1-mutation-in-a-chinese-girl-with-fanconi-anemia
#2
Weiqing Wu, Yang Liu, Qinghua Zhou, Qin Wang, Fuwei Luo, Zhiyong Xu, Qian Geng, Peining Li, Hui Z Zhang, Jiansheng Xie
Fanconi Anemia (FA) is a rare genetically heterogeneous disorder with 17 known complement groups caused by mutations in different genes. FA complementation group L (FA-L, OMIM #608111) occurred in 0.2% of all FA and only eight mutant variants in the FANCL gene were documented. Phenotype and genotype correlation in FANCL associated FA is still obscure. Here we describe a Chinese girl with FA-L caused by a novel homozygous mutation c.822_823insCTTTCAGG (p.Asp275LeufsX13) in the FANCL gene. The patient's clinical course was typical for FA with progression to bone marrow failure, and death from acute myelomonocytic leukemia (AML-M4) at 9 years of age...
April 15, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28414188/a-case-of-splenomegaly-in-cbl-syndrome
#3
Rachel R Coe, Margaret L McKinnon, Maja Tarailo-Graovac, Colin J Ross, Wyeth W Wasserman, Jan M Friedman, Paul C Rogers, Clara D M van Karnebeek
INTRODUCTION: We present a child with unexplained splenomegaly to highlight this feature as a presenting sign of the RASopathy CBL syndrome and to draw attention to the power and utility of next generation genomic sequencing for providing rapid diagnosis and critical information to guide care in the pediatric clinical setting. CLINICAL REPORT: A 7-year-old boy presented with unexplained splenomegaly, attention deficit hyperactivity disorder, mild learning difficulties, easy bruising, mild thrombocytopenia, and subtle dysmorphic features...
April 13, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28414089/juvenile-myelomonocytic-leukemia-with-prominent-cd141-myeloid-dendritic-cell-differentiation
#4
Howard Meyerson, Amad Awadallah, Georgetta Blidaru, Ebenezer Osei, June Schlegelmilch, Rachel Egler, Rolla Abu-Arja, Hilda Ding
Myeloid malignancies showing CD141(+) myeloid dendritic cell (MDC) differentiation have not been documented. Here, we describe a patient with juvenile myelomonocytic leukemia (JMML) in which a prominent CD141(+) cell population was identified most consistent with CD141(+) MDCs based on phenotypic similarity with normal CD141(+) MDCs. Molecular studies demonstrated a KRAS mutation. The findings from the spleen and bone marrow are described. This is the first well-documented demonstration of CD141(+) MDC differentiation of a hematopoietic neoplasm...
April 13, 2017: Human Pathology
https://www.readbyqxmd.com/read/28389358/microrna-125b-inhibits-aml-cells-differentiation-by-directly-targeting-fes
#5
Jinhang Hu, Lufeng Zheng, Xiao Shen, Yan Zhang, Cheng Li, Tao Xi
MicroRNA-125b (miR-125b) has been reported to be upregulated in several kinds of leukemia, suggesting that miR-125b plays a role in Leukemia development. In this study, it was shown that miR-125b expression level decreased in response to 1α, 25-dihydroxy-vitamin D3 (1,25D3) in a dose- and time-dependent manner and miR-125b blocked 1,25D3-induced monocytic differentiation of U937 cells. In addition, miR-125b decreased mRNA expression of myelomonocytic differentiation markers, including CD11c, CD18 and CD64 and arrested the cell cycle at the S phase in U937 and HL60 cells...
April 4, 2017: Gene
https://www.readbyqxmd.com/read/28376531/aleukemic-myeloid-leukemia-cutis-with-a-kikuchi-disease-like-inflammatory-pattern-in-myelodysplastic-syndrome
#6
Michelle Khieu, Alexis Beauvais, Rebecca Matz, Adrian Bersabe, Patrick Brown, Alexander Brown, Eric Fillman, Jordan Hall
Myeloid leukemia cutis (MLC) is a rare disease characterized by the infiltration of neoplastic myeloid, myelomonocytic, or monocytic precursors into the skin, producing clinically nonspecific-appearing papules, nodules, plaques, or purpura that necessitate biopsy for definitive diagnosis. In general, it is considered an extramedullary manifestation of acute myeloid leukemia (AML) similar to myeloid sarcoma, also known as a chloroma. MLC often develops in patients with an established diagnosis of AML and is only rarely seen before the onset of systemic disease...
April 2017: Southern Medical Journal
https://www.readbyqxmd.com/read/28371234/clinical-and-prognostic-significance-of-eosinophilia-and-inv-16-t-16-16-in-pediatric-acute-myelomonocytic-leukemia-aml-m4
#7
Kim Klein, Valérie de Haas, Ingrid E M Bank, H Berna Beverloo, C Michel Zwaan, Gertjan L Kaspers
BACKGROUND: The cytogenetic aberrations inv(16)(p13.1q22)/t(16;16)(p13.1;q22), frequently detected in acute myelomonocytic leukemia with eosinophilia (FAB type M4eo), are generally considered a prognostically favorable subgroup. M4eo comprises a distinct morphology compared to M4 without eosinophilia (M4eo-) and therefore may be indicative for a different pathogenesis. PROCEDURES: Morphology and cytogenetic/molecular analyses of a Dutch cohort of pediatric acute myelomonocytic leukemia (AML-M4) patients were performed and studied in order to analyze the association between the presence of eosinophilia morphology (M4eo+), inv(16)/t(16;16) (inv(16)+), clinical features, and outcome...
March 30, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28370365/monocytosis-in-polycythemia-vera-clinical-and-molecular-correlates
#8
Daniela Barraco, Sonia Cerquozzi, Naseema Gangat, Mrinal M Patnaik, Terra Lasho, Christy Finke, Curtis A Hanson, Rhett P Ketterling, Animesh Pardanani, Ayalew Tefferi
Monocytosis (absolute monocyte count, AMC ≥1 x 10(9) /L) might accompany a spectrum of myeloid neoplasms, other than chronic myelomonocytic leukemia (CMML). In the current study, we examined the prevalence, laboratory and molecular correlates, and prognostic relevance of monocytosis in polycythemia vera (PV). Among 267 consecutive patients with World Health Organization (WHO)-defined PV, 55 (21%) patients displayed an AMC of ≥1 x 10(9) /L and 18 (7%) an AMC of ≥1.5 x 10(9) /L. In general, PV patients with monocytosis were significantly older and displayed higher frequencies of leukocytosis (81% vs 50% at AMC ≥1 x 10(9) /L) and TET2/SRSF2 mutations (57%/29% vs 19%/1% at AMC≥1...
March 28, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28370097/natural-history-of-chronic-myelomonocytic-leukemia-treated-with-hypomethylating-agents
#9
Ana Alfonso, Guillermo Montalban-Bravo, Koichi Takahashi, Elias J Jabbour, Tapan Kadia, Farhad Ravandi, Jorge Cortes, Zeev Estrov, Gautam Borthakur, Naveen Pemmaraju, Marina Konopleva, Carlos Bueso-Ramos, Sherry Pierce, Hagop Kantarjian, Guillermo Garcia-Manero
Hypomethylating agents (HMA) are the most commonly used therapeutic intervention in chronic myelomonocytic leukemia (CMML). Due to the lack of CMML-specific clinical trials, the impact of these agents in the natural history of CMML is not fully understood. We present the largest retrospective series of CMML (n=151) treated with HMA. Mean age at diagnosis was 69 years (range 50-88). According to the CMML-specific prognostic scoring system (CPSS): 17 (15%) were low-risk, 45 (39%) intermediate-1 risk, 42 (36%) intermediate-2, and 12 (10%) high-risk...
March 28, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28368509/in-higher-risk-myelodysplastic-syndromes-and-low-blast-count-acute-myeloid-leukemia-results-of-the-bmt-aza-prospective-study
#10
M T Voso, G Leone, A Piciocchi, L Fianchi, S Santarone, A Candoni, M Criscuolo, A Masciulli, E Cerqui, A Molteni, C Finelli, M Parma, A Poloni, A M Carella, F Spina, A Cortelezzi, F Salvi, E P Alessandrino, A Rambaldi, S Sica
Background: Allogeneic stem cell transplantation (HSCT) is the only curative treatment in myelodysplastic syndromes (MDS). Azacitidine (AZA) is increasingly used prior to HSCT, however in Europe it is only approved for patients who are not eligible for HSCT. Patients and Methods: We conducted a phase II multicenter study to prospectively evaluate the feasibility of HSCT after treatment with AZA in 70 patients with a myelodysplastic syndrome (MDS), 19 with acute myeloid leukemia (AML), and 8 with chronic myelomonocytic leukemia (CMML)...
March 29, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28359286/the-double-edged-sword-of-re-expression-of-genes-by-hypomethylating-agents-from-viral-mimicry-to-exploitation-as-priming-agents-for-targeted-immune-checkpoint-modulation
#11
REVIEW
Florian Wolff, Michael Leisch, Richard Greil, Angela Risch, Lisa Pleyer
Hypomethylating agents (HMAs) have been widely used over the last decade, approved for use in myelodysplastic syndrome (MDS), chronic myelomonocytic leukemia (CMML) and acute myeloid leukemia (AML). The proposed central mechanism of action of HMAs, is the reversal of aberrant methylation in tumor cells, thus reactivating CpG-island promoters and leading to (re)expression of tumor suppressor genes. Recent investigations into the mode of action of azacitidine (AZA) and decitabine (DAC) have revealed new molecular mechanisms that impinge on tumor immunity via induction of an interferon response, through activation of endogenous retroviral elements (ERVs) that are normally epigenetically silenced...
March 31, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/28359030/increase-of-dna-damage-and-alteration-of-the-dna-damage-response-in-myelodysplastic-syndromes-and-acute-myeloid-leukemias
#12
Henning D Popp, Nicole Naumann, Susanne Brendel, Thomas Henzler, Christel Weiss, Wolf-Karsten Hofmann, Alice Fabarius
Increased DNA damage and alteration of the DNA damage response (DDR) are critical features of genetic instability presumably implicated in pathogenesis of myelodysplastic syndromes (MDS) and acute myeloid leukemias (AML). We used immunofluorescence staining of γH2AX and 53BP1 for analyzing DNA double-strand breaks (DSB) in MDS and AML cell lines, in CD34+ selected cells of normal and MDS bone marrow (including three cases of chronic myelomonocytic leukemias) and in blasts of AML bone marrow. In addition, we screened for activation of the DDR by immunoblotting of p-ATM, p-ATR, p-CHK1, p-CHK2 and p-TP53...
March 21, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28296991/clinicopathologic-immunohistochemical-and-molecular-features-of-histiocytoid-sweet-syndrome
#13
Victoria Alegría-Landa, Socorro María Rodríguez-Pinilla, Angel Santos-Briz, José Luis Rodríguez-Peralto, Victor Alegre, Lorenzo Cerroni, Heinz Kutzner, Luis Requena
Importance: Histiocytoid Sweet syndrome is a rare histopathologic variant of Sweet syndrome. The nature of the histiocytoid infiltrate has generated considerable controversy in the literature. Objective: The main goal of this study was to conduct a comprehensive overview of the immunohistochemical phenotype of the infiltrate in histiocytoid Sweet syndrome. We also analyze whether this variant of Sweet syndrome is more frequently associated with hematologic malignancies than classic Sweet syndrome...
March 15, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28292946/nox2-dependent-immunosuppression-in-chronic-myelomonocytic-leukemia
#14
Johan Aurelius, Alexander Hallner, Olle Werlenius, Rebecca Riise, Lars Möllgård, Mats Brune, Markus Hansson, Anna Martner, Fredrik B Thorén, Kristoffer Hellstrand
Chronic myelomonocytic leukemia (CMML) is a myeloproliferative and myelodysplastic neoplasm with few treatment options and dismal prognosis. The role of natural killer (NK) cells and other antileukemic lymphocytes in CMML is largely unknown. We aimed to provide insight into the mechanisms of immune evasion in CMML with a focus on immunosuppressive reactive oxygen species (ROS) formed by the myeloid cell NADPH oxidase-2 (NOX2). The dominant population of primary human CMML cells was found to express membrane-bound NOX2 and to release ROS, which, in turn, triggered extensive PARP-1-dependent cell death in cocultured NK cells, CD8(+) T effector memory cells, and CD8(+) T effector cells...
March 14, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28286197/a-lot-to-learn-about-allogeneic-hematopoietic-cell-transplantation-for-chronic-myelomonocytic-leukemia
#15
Guillermo F Sanz
No abstract text is available yet for this article.
March 9, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28275539/a-case-of-acute-myeloid-leukemia-with-e6a2-bcr-abl-fusion-transcript-acquired-after-progressing-from-chronic-myelomonocytic-leukemia
#16
Jinjuan Yao, Dan Douer, Lu Wang, Maria E Arcila, Khedoudja Nafa, April Chiu
Philadelphia (Ph) chromosome is a cytogenetic hallmark of chronic myeloid leukemia (CML). Most patients with CML harbor either the e13a2 or e14a2 BCR-ABL fusion product, while a small subset of the cases expresses e1a2 or e19a2 transcripts. We report a patient with chronic myelomonocytic leukemia (CMML), initially Ph chromosome negative at presentation, with rapid disease progression to acute myeloid leukemia (AML) and appearance of Ph chromosome and BCR-ABL e6a2, a very uncommon fusion transcript. The AML was refractory to treatment with subsequent emergence and dominance of a Ph negative leukemic clone...
2017: Leukemia Research Reports
https://www.readbyqxmd.com/read/28274536/chronic-myelomonocytic-leukemia-blast-crisis-in-a-patient-with-advanced-non-small-cell-lung-cancer-treated-with-egfr-tyrosine-kinase-inhibitors
#17
Hiroaki Ogata, Isamu Okamoto, Goichi Yoshimoto, Teppei Obara, Kayo Ijichi, Eiji Iwama, Taishi Harada, Koichi Akashi, Yoichi Nakanishi
A 59-year-old woman with epidermal growth factor receptor gene (EGFR) mutation-positive advanced lung adenocarcinoma was treated with afatinib after a diagnosis of chronic myelomonocytic leukemia (CMML). Twenty-one weeks later, she developed agranulocytosis, and CMML subsequently progressed to blast crisis. After complete remission of CMML, gefitinib was initiated; however, agranulocytosis recurred. This is the first reported case of both EGFR mutation-positive advanced non-small cell lung cancer with CMML, and of CMML blast crisis...
March 2017: Respiratory Investigation
https://www.readbyqxmd.com/read/28253492/identification-of-a-cryptic-insertion-ins-11-x-q23-q28q12-resulting-in-a-kmt2a-flna-fusion-in-a-13-month-old-child-with-acute-myelomonocytic-leukemia
#18
Jana Lentes, Kathrin Thomay, Dominik T Schneider, Benedikt Bernbeck, Dirk Reinhardt, Rolf Marschalek, Claus Meyer, Brigitte Schlegelberger, Gudrun Göhring
In pediatric acute myeloid leukemia (AML), chromosomal abnormalities leading to a disruption of the lysine methyltransferase 2A (KMT2A) gene in 11q23 are the most frequent rearrangements. Here, we report on the identification of a novel cryptic insertion, ins(11;X)(q23;q28q12), resulting in a translocation of the KMT2A gene in 11q23, leading to a KMT2A-FLNA fusion in a 13-month-old boy with de novo acute myelomonocytic leukemia, who died 38 days after diagnosis. The patient presented a complex karyotype 48∼49,Y,del(X)(q12),+del(X)(q12),+8,ins(11;X)(q23; q28q12),+19...
2016: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28244637/blastic-transformation-of-juvenile-myelomonocytic-leukemia-caused-by-the-copy-number-gain-of-oncogenic-kras
#19
Tomoo Osumi, Motohiro Kato, Meri Ouchi-Uchiyama, Daisuke Tomizawa, Keisuke Kataoka, Yoichi Fujii, Masafumi Seki, Junko Takita, Seishi Ogawa, Toru Uchiyama, Kentaro Ohki, Nobutaka Kiyokawa
Previous studies have reported several cases of juvenile myelomonocytic leukemia (JMML) developing blastic transformation during an indolent clinical course, but the underlying mechanism of transformation is still not well understood. In this report, we describe a case of JMML with blastic transformation possibly caused by additional copy number gains of the KRAS mutant allele. We have discovered that the copy number gain of the mutant allele is an additional possible cause of blastic transformation in JMML...
February 28, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28209919/clinical-significance-of-csf3r-srsf2-and-setbp1-mutations-in-chronic-neutrophilic-leukemia-and-chronic-myelomonocytic-leukemia
#20
Yuan Ouyang, Chun Qiao, Yu Chen, Su-Jiang Zhang
Chronic neutrophilic leukemia (CNL) and chronic myelomonocytic leukemia (CMML) are rare hematologic neoplasms. We performed CSF3R, SRSF2 and SETBP1 mutational analyses in 10 CNL and 56 CMML patients. In this sample cohort, 80% of CNL patients harbored CSF3R mutations, of which the CSF3R T618I mutation was dominant. Mutations in CSF3R and SETBP1 were found in 7.1% and 5.3% CMML patients respectively, while 25% of CMML patients carried SRSF2 mutations. Strikingly, we identified that all of the CSF3R mutations detected in CMML patients were represented by a P733T mutation...
March 28, 2017: Oncotarget
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