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51.
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52.
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53.
  • Amirian, E. Susan, et al. (författare)
  • History of chickenpox in glioma risk : a report from the glioma international case-control study (GICC)
  • 2016
  • Ingår i: Cancer Medicine. - 2045-7634 .- 2045-7634. ; 5:6, s. 1352-1358
  • Tidskriftsartikel (refereegranskat)abstract
    • Varicella zoster virus (VZV) is a neurotropic alpha-herpesvirus that causes chickenpox and establishes life-long latency in the cranial nerve and dorsal root ganglia of the host. To date, VZV is the only virus consistently reported to have an inverse association with glioma. The Glioma International Case-Control Study (GICC) is a large, multisite consortium with data on 4533 cases and 4171 controls collected across five countries. Here, we utilized the GICC data to confirm the previously reported associations between history of chickenpox and glioma risk in one of the largest studies to date on this topic. Using two-stage random-effects restricted maximum likelihood modeling, we found that a positive history of chickenpox was associated with a 21% lower glioma risk, adjusting for age and sex (95% confidence intervals (CI): 0.65-0.96). Furthermore, the protective effect of chickenpox was stronger for high-grade gliomas. Our study provides additional evidence that the observed protective effect of chickenpox against glioma is unlikely to be coincidental. Future studies, including meta-analyses of the literature and investigations of the potential biological mechanism, are warranted.
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54.
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55.
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56.
  • Andersson, Anne, 1966- (författare)
  • Long-term side effects after treatment of Hodgkin's lymphoma
  • 2011
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • Background Long-term side effects associated with the treatment of Hodgkin’s lymphoma (HL) have frequently been reported during the last decades. Studies have shown increased mortality in HL survivors. Following Hodgkin’s lymphoma, second malignancies (SM) and cardiovascular disease (CVD) are the most common causes of death in individuals treated for HL. This study investigates the incidence of side effects such as SM, CVD and infections in a cohort diagnosed with HL in Sweden between 1965 and 1995. In addition, this study identifies covariate risk factors for late side effects in order to develop strategies that prevent morbidity and mortality in HL survivors. Methods Using the Swedish Cancer Registry (SCR) at the National Board of Health and Welfare and the Multi-Generation Registry at Statistics (MGR) Sweden, we identified 6946 individuals diagnosed with HL between the years 1965 and 1995, and their first degree relatives (FDR) (n=17 858). In addition we identified the malignancies and inpatient care for CVD and infections for the HL cohort and their FDR. The standard incidence ratio (SIR) was calculated for the risk of SM, CVD and infections. For SM and CVD the risk also was stratified and calculated for family history of disease. The Swedish Hodgkin Intervention and Prevention study (SHIP), a prospective study, invited 702 individuals treated for HL at the age of 45 years or younger and who were treated in the region of Skåne, Uppsala or Umeå. The participants completed a questionnaire and were invited to an out-patient visit to an oncologist with clinical examination and blood tests. Any pathological findings were referred for further investigation. Results An increased risk for SM in HL long-term survivors was observed and seems to increase with the number of FDRs with cancer. There was also an increased risk for inpatient care due to congestive heart failure (CHF) and coronary artery disease (CAD). A family history of CHF and CAD further increased the risk for these diseases. The risk for inpatient care due to infections was increased and remained increased after 20 years or longer. The risk for infections was associated with splenectomy and hypothyroidism. Radiotherapy was an independent risk factor for cardiovascular disease in the cohort of the prospective study. ConclusionLong-term survivors from HL have an increased risk for developing late side effects such as SM, CVD and infections. Since many HL patients are young and the cure rate from the disease is high, it is of great importance to offer focused surveillance programs to selected individuals who are at high risk, e.g. individuals who received radiotherapy as part of their treatment and who have other known risk factors for cardiovascular disease such as hypertension, hypercholesterolemia, family history and smoking.
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57.
  • Andersson, Ulrika, et al. (författare)
  • Germline rearrangements in families with strong family history of glioma and malignant melanoma, colon, and breast cancer
  • 2014
  • Ingår i: Neuro-Oncology. - : Oxford University Press. - 1522-8517 .- 1523-5866. ; 16:10, s. 1333-1340
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Although familial susceptibility to glioma is known, the genetic basis for this susceptibility remains unidentified in the majority of glioma-specific families. An alternative approach to identifying such genes is to examine cancer pedigrees, which include glioma as one of several cancer phenotypes, to determine whether common chromosomal modifications might account for the familial aggregation of glioma and other cancers. Methods: Germline rearrangements in 146 glioma families (from the Gliogene Consortium; http://www.gliogene.org/) were examined using multiplex ligation-dependent probe amplification. These families all had at least 2 verified glioma cases and a third reported or verified glioma case in the same family or 2 glioma cases in the family with at least one family member affected with melanoma, colon, or breast cancer. The genomic areas covering TP53, CDKN2A, MLH1, and MSH2 were selected because these genes have been previously reported to be associated with cancer pedigrees known to include glioma. Results: We detected a single structural rearrangement, a deletion of exons 1-6 in MSH2, in the proband of one family with 3 cases with glioma and one relative with colon cancer. Conclusions: Large deletions and duplications are rare events in familial glioma cases, even in families with a strong family history of cancers that may be involved in known cancer syndromes.
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58.
  • Andersson, Ulrika, et al. (författare)
  • The association between longer relative leukocyte telomere length and risk of glioma is independent of the potentially confounding factors allergy, BMI, and smoking
  • 2019
  • Ingår i: Cancer Causes and Control. - : Springer. - 0957-5243 .- 1573-7225. ; 30:2, s. 177-185
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: Previous studies have suggested an association between relative leukocyte telomere length (rLTL) and glioma risk. This association may be influenced by several factors, including allergies, BMI, and smoking. Previous studies have shown that individuals with asthma and allergy have shortened relative telomere length, and decreased risk of glioma. Though, the details and the interplay between rLTL, asthma and allergies, and glioma molecular phenotype is largely unknown. Methods: rLTL was measured by qPCR in a Swedish population-based glioma case–control cohort (421 cases and 671 controls). rLTL was related to glioma risk and health parameters associated with asthma and allergy, as well as molecular events in glioma including IDH1 mutation, 1p/19q co-deletion, and EGFR amplification. Results: Longer rLTL was associated with increased risk of glioma (OR = 1.16; 95% CI 1.02–1.31). Similar to previous reports, there was an inverse association between allergy and glioma risk. Specific, allergy symptoms including watery eyes was most strongly associated with glioma risk. High body mass index (BMI) a year prior diagnosis was significantly protective against glioma in our population. Adjusting for allergy, asthma, BMI, and smoking did not markedly change the association between longer rLTL and glioma risk. rLTL among cases was not associated with IDH1 mutation, 1p/19q co-deletion, or EGFR amplification, after adjusting for age at diagnosis and sex. Conclusions: In this Swedish glioma case–control cohort, we identified that long rLTL increases the risk of glioma, an association not confounded by allergy, BMI, or smoking. This highlights the complex interplay of the immune system, rLTL and cancer risk.
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59.
  • Arason, Adalgeir, et al. (författare)
  • Genome-wide search for breast cancer linkage in large Icelandic non-BRCA1/2 families
  • 2010
  • Ingår i: Breast Cancer Research. - : BioMed Central (BMC). - 1465-5411 .- 1465-542X. ; 12:4
  • Tidskriftsartikel (refereegranskat)abstract
    • Introduction: A significant proportion of high-risk breast cancer families are not explained by mutations in known genes. Recent genome-wide searches (GWS) have not revealed any single major locus reminiscent of BRCA1 and BRCA2, indicating that still unidentified genes may explain relatively few families each or interact in a way obscure to linkage analyses. This has drawn attention to possible benefits of studying populations where genetic heterogeneity might be reduced. We thus performed a GWS for linkage on nine Icelandic multiple-case non-BRCA1/2 families of desirable size for mapping highly penetrant loci. To follow up suggestive loci, an additional 13 families from other Nordic countries were genotyped for selected markers. Methods: GWS was performed using 811 microsatellite markers providing about five centiMorgan (cM) resolution. Multipoint logarithm of odds (LOD) scores were calculated using parametric and nonparametric methods. For selected markers and cases, tumour tissue was compared to normal tissue to look for allelic loss indicative of a tumour suppressor gene. Results: The three highest signals were located at chromosomes 6q, 2p and 14q. One family contributed suggestive LOD scores (LOD 2.63 to 3.03, dominant model) at all these regions, without consistent evidence of a tumour suppressor gene. Haplotypes in nine affected family members mapped the loci to 2p23.2 to p21, 6q14.2 to q23.2 and 14q21.3 to q24.3. No evidence of a highly penetrant locus was found among the remaining families. The heterogeneity LOD (HLOD) at the 6q, 2p and 14q loci in all families was 3.27, 1.66 and 1.24, respectively. The subset of 13 Nordic families showed supportive HLODs at chromosome 6q (ranging from 0.34 to 1.37 by country subset). The 2p and 14q loci overlap with regions indicated by large families in previous GWS studies of breast cancer. Conclusions: Chromosomes 2p, 6q and 14q are candidate sites for genes contributing together to high breast cancer risk. A polygenic model is supported, suggesting the joint effect of genes in contributing to breast cancer risk to be rather common in non-BRCA1/2 families. For genetic counselling it would seem important to resolve the mode of genetic interaction.
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60.
  • Arroyo, Vidal M., et al. (författare)
  • Soft tissue sarcoma clinical presentation, treatment, and survival in adolescents and young adults compared to older adults : A report from the Scandinavian Sarcoma Group
  • 2018
  • Ingår i: Cancer Research. - : American Association for Cancer Research. - 0008-5472 .- 1538-7445. ; 78:13
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • Background: Five-year survival rates for those diagnosed with soft tissue sarcoma (STS) have improved significantly among children and older adults (OAs), but these same trends have not been observed for adolescents and young adults (AYAs). While these disparities could be due to differences in biology or treatment, few studies have evaluated STS occurrence and outcome in AYAs. Therefore, the purpose of this study was to evaluate differences between adolescents and young adults (AYAs) and older adults (OAs) diagnosed with STS by stratifying analysis by: (1) clinical presentation; (2) treatment; and (3) survival.Methods: Data were obtained from the Scandinavian Sarcoma Group (SSG) Central Register, which includes information on 5,747 patients from Sweden and Norway, diagnosed with a STS during 1986-2011. Variables included: age at diagnosis, metastasis at diagnosis, tumor size, histology, adjuvant treatment, date of death or last follow-up. AYAs were defined as those diagnosed ages 15-39 years. Categorical variables were analyzed using chi-square tests, and continuous variables were analyzed using t-tests. Overall survival (OS) and recurrence-free survival (RFS) were compared between AYAs and OAs using Kaplan-Meier estimates and log-rank tests. All analyses were conducted overall and by common STS subtypes.Results: Overall and by STS subtype, there were significant differences between AYAs and OAs on presentation, treatment, and survival. The distribution of STS subtypes was different between OAs and AYAs. For example, OAs were more likely to be diagnosed with leiomyosarcoma compared to AYAs (18% vs. 10%, p<0.001), whereas AYAs were more likely to be diagnosed with malignant peripheral nerve sheath tumor (MPNST, 9% vs. 4%, p<0.001). OAs were also more likely to have larger tumors (>5 cm, 67% vs. 52%, p<0.001) and higher malignancy grade (grade IV, 45% vs. 31%, p<0.001). Interestingly, AYAs were more likely to be treated with radiotherapy and chemotherapy compared to OAs (12% vs. 5%, p<0.001). There were also differences within STS subtypes. For example, OAs were more likely to have metastasis compared to AYAs if diagnosed with leiomyosarcoma (18% vs. 10%, p=0.04). In most scenarios AYAs had significantly better OS and RFS compared to OAs, other than for MPNST (OS: p=0.19, RFS: p=0.28).Conclusions: There were several differences between AYAs and OAs on STS presentation, treatment, and outcome. AYAs not only had differences in terms of STS subtypes but also tumor size and malignancy grade within subtypes. Additional work is needed to characterize the biology underlying these differences, which will inform future treatment strategies for both AYAs and OAs with STS.
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