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  • Johansson, Carl-Johan, et al. (författare)
  • Sågverksnytt nr 1
  • 2013
  • Rapport (övrigt vetenskapligt)
  • Lazarevic, Vladimir, et al. (författare)
  • Failure matters: unsuccessful cytogenetics and unperformed cytogenetics are associated with a poor prognosis in a population-based series of acute myeloid leukaemia.
  • 2015
  • Ingår i: European Journal of Haematology. - Wiley-Blackwell. - 1600-0609. ; 94:5, s. 419-423
  • Tidskriftsartikel (refereegranskat)abstract
    • Unsuccessful cytogenetics (UC) in acute myeloid leukaemia (AML) patients treated on different SWOG trials was recently reported to be associated with increased age and dismal outcome. In order to ascertain whether this holds true also in unselected AML patients, we retrieved all cytogenetic reports in cases from the population-based Swedish AML Registry. Between 1997 and 2006, 1737 patients below the age of 80 years without myelosarcoma or acute promyelocytic leukaemia received intensive treatment. The frequencies of UC and unperformed cytogenetics (UPC) were 2.1% and 20%, respectively. The early death rates differed between the cytogenetic subgroups (P = 0.006) with the highest rates in patients with UC (14%) and UPC (12%) followed by high risk (HR) AML, intermediate risk (IR), and standard risk (SR) cases successfully karyotyped (8.6%, 5.9%, and 5.8%, respectively). The complete remission rate was lower in UC and UPC and HR compared with the other risk groups (P < 0.001). The overall five-year survival rates were 25% for UC and 22% for UPC, whereas the corresponding frequencies for SR, IR, and HR AML patients without UC and UPC were 64%, 31%, and 15%, respectively. In conclusion, lack of cytogenetic data translates into a poor prognosis. This article is protected by copyright. All rights reserved.
  • Lazarevic, Vladimir, et al. (författare)
  • Prognostic significance of high hyperdiploid and tri-/tetraploid adult acute myeloid leukemia.
  • 2015
  • Ingår i: American Journal of Hematology. - John Wiley and Sons Inc.. - 0361-8609. ; 90:9, s. 800-805
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose To ascertain the clinical implications of high hyperdiploid (HH; 49-65 chromosomes) and tri-/tetraploid (TT; >65 chromosomes) adult acute myeloid leukemia (AML), all such cases were retrieved from the Swedish AML Registry. Results Of the 3,654 cytogenetically informative cases diagnosed between January 1997 and May 2014, 68 (1.9%) were HH (n=50)/TT (n=18). Patients with HH/TT were older than those with intermediate risk (IR) AML (median 71 years versus 67 years; P = 0.042) and less often had de novo AML (63% versus 79%; P = 0.004); no such differences were observed between HH/TT and complex karyotype (CK) AML. The overall survival (OS) was similar between patients with HH/TT and CK AML (median 0.9 years versus 0.6 years; P = 0.082), whereas OS was significantly longer (median 1.6 years; P = 0.028) for IR AML. The OS was shorter for cases with HH than with TT (median 0.6 years versus 1.4 years; P = 0.032) and for HH/TT AMLs with adverse abnormalities (median 0.8 years versus 1.1 years; P = 0.044). Conclusions In conclusion, HH/TT AML is associated with a poor outcome, but chromosome numbers >65 and absence of adverse aberrations seem to translate into a more favorable prognosis. Thus, HH/TT AMLs are clinically heterogeneous and should not automatically be grouped as high risk. This article is protected by copyright. All rights reserved.
  • Lj Lazarevic, Vladimir, et al. (författare)
  • Incidence and prognostic significance of isolated trisomies in adult acute myeloid leukemia : A population-based study from the Swedish AML registry
  • 2017
  • Ingår i: European Journal of Haematology. - John Wiley & Sons. - 0902-4441. ; 98:5, s. 493-500
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES AND METHODS: To ascertain the incidence/clinical implications of isolated autosomal trisomies in adult acute myeloid leukemia (AML), all such cases were retrieved from the Swedish AML Registry.RESULTS: Of the 3179 cytogenetically informative AMLs diagnosed January 1997-May 2015, 246 (7.7%) had isolated trisomies. The frequency increased by age (2.4% at age 18-60 years vs. 23% at &gt;60 years; P&lt;.0001); the median age was 69 years. The five most common were +8 (4.0%), +13 (0.9%), +11 (0.8%), +21 (0.7%), and +4 (0.5%). Age and gender, types of AML and treatment, and complete remission and early death rates did not differ between the single trisomy and the intermediate risk (IR) groups or among cases with isolated gains of chromosomes 4, 8, 11, 13, or 21. The overall survival (OS) was similar in the single trisomy (median 1.6 years) and IR groups (1.7 years; P=.251). The OS differed among the most frequent isolated trisomies; the median OS was 2.5 years for +4, 1.9 years for +21, 1.5 years for +8, 1.1 years for +11, and 0.8 years for +13 (P=.013).CONCLUSION: AML with single trisomies, with the exception of +13, should be grouped as IR.
  • Rudell, Bertil, et al. (författare)
  • Luftföroreningar vid svetsning
  • 1977
  • Rapport (övrigt vetenskapligt)abstract
    • PIXE-analyser kan utföras med utvecklad analysuppställning med noggrannhet och precision av c:a 10 % och med hög analyskapacitet. Ett dataprogram för evaluering av räntgenspektra presenteras. Inverkan av provtjocklek vid PIXE-analys av inhomogena prov har studerats och korrektioner föreslås. Fluorinnehållet i filterprov har bestämts, samtidigt med PIXE-analys, genom utnyttjande av en kärnfysikalisk reaktion som ger resultat med god noggrannhet och precision. Svetsaerosoler har karakteriserats m.h.a. PIXE, ESCA och TEM/EDAX. En uppställning för insamling av svetsaerosoler under utveckling och hittillsvarande resultat indikerar representativ provinsamling med god reproducerbarhet.
  • Andersen, Mette K, et al. (författare)
  • Paediatric B-cell precursor acute lymphoblastic leukaemia with t(1;19)(q23;p13): clinical and cytogenetic characteristics of 47 cases from the Nordic countries treated according to NOPHO protocols.
  • 2011
  • Ingår i: British Journal of Haematology. - Federation of European Neuroscience Societies and Blackwell Publishing Ltd. - 0007-1048. ; 155, s. 235-243
  • Tidskriftsartikel (refereegranskat)abstract
    • The translocation t(1;19)(q23;p13)/der(19)t(1;19) is a risk stratifying aberration in childhood B-cell precursor acute lymphoblastic leukaemia (BCP ALL) in the Nordic countries. We have identified 47 children/adolescents with t(1;19)/der(19)t(1;19)-positive BCP ALL treated on two successive Nordic Society of Paediatric Haematology and Oncology (NOPHO) protocols between 1992 and 2007 and have reviewed the clinical and cytogenetic characteristics of these cases, comprising 1·8% of all cases. The translocation was balanced in 15 cases (32%) and unbalanced in 29 cases (62%). The most common additional chromosome abnormalities were del(9p), i(9q), del(6q), and del(13q). The median age was 7 years, the median white blood cell (WBC) count was 16 × 10(9) /l, and the female/male ratio was 1·2. The predicted event-free survival (EFS) at 5 and 10 years was 0·79, whereas the predicted overall survival (OS) at 5 and 10 years was 0·85 and 0·82, respectively. Nine patients had a bone marrow relapse after a median of 23 months; no patient had a central nervous system relapse. Additional cytogenetic abnormalities, age, gender, WBC count or whether the t(1;19) was balanced or unbalanced did not influence EFS or OS. Compared to cases with t(12,21) and high hyperdiploidy, EFS was similar, but overall survival was worse in patients with t(1;19)/der(19)t(1;19) (P = 0·004).
  • Andersson, Anna, et al. (författare)
  • Microarray-based classification of a consecutive series of 121 childhood acute leukemias: prediction of leukemic and genetic subtype as well as of minimal residual disease status.
  • 2007
  • Ingår i: Leukemia. - Nature Publishing Group. - 1476-5551. ; 21:6, s. 1198-1203
  • Tidskriftsartikel (refereegranskat)abstract
    • Gene expression analyses were performed on 121 consecutive childhood leukemias (87 B-lineage acute lymphoblastic leukemias (ALLs), 11 T-cell ALLs and 23 acute myeloid leukemias (AMLs)), investigated during an 8-year period at a single center. The supervised learning algorithm k-nearest neighbor was utilized to build gene expression predictors that could classify the ALLs/AMLs according to clinically important subtypes with high accuracy. Validation experiments in an independent data set verified the high prediction accuracies of our classifiers. B-lineage ALLs with uncharacteristic cytogenetic aberrations or with a normal karyotype displayed heterogeneous gene expression profiles, resulting in low prediction accuracies. Minimal residual disease status (MRD) in T-cell ALLs with a high (40.1%) MRD at day 29 could be classified with 100% accuracy already at the time of diagnosis. In pediatric leukemias with uncharacteristic cytogenetic aberrations or with a normal karyotype, unsupervised analysis identified two novel subgroups: one consisting mainly of cases remaining in complete remission (CR) and one containing a few patients in CR and all but one of the patients who relapsed. This study of a consecutive series of childhood leukemias confirms and extends further previous reports demonstrating that global gene expression profiling provides a valuable tool for genetic and clinical classification of childhood leukemias.
  • Broliden, Per Anders, et al. (författare)
  • Antithymocyte globulin and cyclosporine A as combination therapy for low-risk non-sideroblastic myelodysplastic syndromes
  • 2006
  • Ingår i: Haematologica. - 0390-6078 .- 1592-8721. ; 91:5, s. 667-670
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The present study evaluated the combination of antithymocyte globulin (ATG) and cyclosporine A (CsA) in patients with low-risk myelodysplastic syndromes. Twenty patients (17 with refractory anemia and 3 with refractory anemia with excess blasts) received treatment with rabbit-ATG plus CsA. The overall response rate was 30% (6/20); three of the six responders had a complete response. The responses lasted 2-58 months, with two patients still being in complete remission at 42 and 58 months. Short-lasting cytogenetic remissions were achieved in two patients. ATG was poorly tolerated in patients over 70 years of age. Four out of 20 patients progressed to acute myeloid leukemia within a year. We conclude that immunosuppressive treatment may be a therapeutic option for selected patients with myelodysplastic syndrome.</p>
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