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Träfflista för sökning "AMNE:(MEDICAL AND HEALTH SCIENCES Clinical Medicine Cancer and Oncology) "

Sökning: AMNE:(MEDICAL AND HEALTH SCIENCES Clinical Medicine Cancer and Oncology)

  • Resultat 12211-12220 av 17174
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12211.
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12212.
  • Dahlin, Anna M., et al. (författare)
  • Relation between Established Glioma Risk Variants and DNA Methylation in the Tumor
  • 2016
  • Ingår i: PLOS ONE. - : Public library science. - 1932-6203. ; 11:10
  • Tidskriftsartikel (refereegranskat)abstract
    • Genome-wide association studies and candidate gene studies have identified several genetic variants that increase glioma risk. The majority of these variants are non-coding and the mechanisms behind the increased risk in carriers are not known. In this study, we hypothesize that some of the established glioma risk variants induce aberrant DNA methylation in the developing tumor, either locally (gene-specific) or globally (genome-wide). In a pilot data set including 77 glioma patients, we used Illumina beadchip technology to analyze genetic variants in blood and DNA methylation in matched tumor samples. To validate our findings, we used data from the Cancer Genome Atlas, including 401 glioblastoma patients. Consensus clustering identified the glioma CpG island methylator phenotype (gCIMP) and two additional subgroups with distinct patterns of global DNA methylation. In the pilot dataset, gCIMP was associated with two genetic variants in CDKN2B-AS1, rs1412829 and rs4977756 (9p21.3, p = 8.1 x 10(-7) and 4.8 x 10(-5), respectively). The association was in the same direction in the TCGA dataset, although statistically significant only when combining individuals with AG and GG genotypes. We also investigated the relation between glioma risk variants and DNA methylation in the promoter region of genes located within 30 kb of each variant. One association in the pilot dataset, between the TERT risk variant rs2736100 and lower methylation of cg23827991 (in TERT; p = 0.001), was confirmed in the TCGA dataset (p = 0.001). In conclusion, we found an association between rs1412829 and rs4977756 (9p21.3, CDKN2B-AS1) and global DNA methylation pattern in glioma, for which a trend was seen also in the TCGA glioblastoma dataset. We also found an association between rs2736100 (in TERT) and levels of methylation at cg23827991 (localized in the same gene, 3.3 kbp downstream of the risk variant), which was validated in the TCGA dataset. Except for this one association, we did not find strong evidence for gene-specific DNA methylation mediated by glioma risk variants.
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12213.
  • Dahlin, Lars B., et al. (författare)
  • Intraneural glomus tumor of "uncertain malignant potential" and with BRAF mutation in the median nerve - an unusual case
  • 2017
  • Ingår i: Clinical Neuropathology. - 0722-5091. ; 36:7, s. 164-170
  • Tidskriftsartikel (refereegranskat)abstract
    • A glomus tumor of uncertain malignant potential is defined as a glomus tumor with some, but not all, criteria for malignancy and without a known metastasis. Here, we present a rare example presenting in the median nerve in a 40-year-old woman with a long history of severely impaired left median nerve function. A large panel of immunohistochemical stains excluded other diagnoses, and the designation of a "uncertain malignant potential" was based on the high proliferative activity, the tumor size and location, and the lack of WHO malignancy criteria such as marked nuclear atypia, necrosis, or atypical mitoses. A BRAF mutation was found in the tumor. Although extremely rare, both benign and malignant glomus tumors may present in large peripheral nerves and should therefore be considered in the differential diagnosis.
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12214.
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12215.
  • Dahlman, Anna K, et al. (författare)
  • Evaluation of the prognostic significance of MSMB and CRISP3 in prostate cancer using automated image analysis.
  • 2011
  • Ingår i: Modern Pathology : an official journal of the United States and Canadian Academy of Pathology, Inc. - : Elsevier BV. - 1530-0285. ; 24, s. 708-719
  • Tidskriftsartikel (refereegranskat)abstract
    • Despite prostate cancer being the most frequent cancer in men in the Western world, tissue biomarkers for predicting disease recurrence after surgery have not been incorporated into clinical practice. Our group has previously identified β-microseminoprotein (MSMB) and cysteine-rich secretory protein-3 (CRISP3) as independent predictors of biochemical recurrence after radical prostatectomy. The purpose of the present study was to use automated image analysis, enabling quantitative determination of MSMB and CRISP3 expressions in a large cohort and to validate the previous findings. MSMB and CRISP3 protein expressions were assessed on tissue microarrays constructed from 3268 radical prostatectomy specimens. Whole-slide digital images were captured, and a novel cytoplasmic algorithm was used to develop a quantitative scoring model for cytoplasmic staining. Classification regression tree analysis was used to group patients, with different risk for biochemical recurrence, depending on level of protein expression. Patients with tumors expressing high levels of MSMB had a significantly reduced risk for biochemical recurrence after radical prostatectomy (HR=0.468; 95% CI 0.394-0.556; P<0.001). Multivariate analysis adjusted for clinicopathological parameters revealed that MSMB expression was an independent predictor of decreased risk of recurrence (HR=0.710; 95% CI 0.578-0.872; P<0.001). We found no correlation between CRISP3 expression and biochemical recurrence. In this current study, we applied a novel image analysis on a large independent cohort and successfully verified that MSMB is a strong independent factor, predicting favorable outcome after radical prostatectomy for localized prostate cancer.Modern Pathology advance online publication, 14 January 2011; doi:10.1038/modpathol.2010.238.
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12216.
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12217.
  • Dahlman, Disa, et al. (författare)
  • Cervical cancer among Swedish women with drug use disorders : A nationwide epidemiological study
  • 2021
  • Ingår i: Gynecologic Oncology. - : Elsevier BV. - 0090-8258. ; 160:3, s. 742-747
  • Tidskriftsartikel (refereegranskat)abstract
    • Background/Aim: Cervical cancer incidence and mortality has decreased after introduction of national screening in Sweden, but women with drug use disorders (DUD) are less likely to participate in screening programs. We aimed to investigate cervical cancer incidence and mortality among women with DUD compared to the general female population in Sweden. Methods: We conducted a cohort study based on Swedish national register data for the period January 1997–December 2015. Data was collected for 3,838,248 women aged 15–75 years of whom 50,858 had DUD. Adjusted hazard ratios (HRs) for incident and fatal cervical cancer were calculated for women with and without DUD using Cox regression analysis. Results: DUD was significantly associated with incident cervical cancer (HR = 1.39, 95% confidence interval [CI] 1.39–1.61), but not fatal cervical cancer (HR = 1.25, 95% CI: 0.91–1.71), after adjusting for age, educational attainment, social welfare, region of residence, marital status and HIV infection. Conclusion: Women with DUD were thus identified as a risk group for incident cervical cancer, which calls for attention from clinicians and policy makers. It is possible that non-attendance in cancer screening and other healthcare seeking barriers may affect the risk of incident cervical cancer among women with DUD but more research on this topic is needed.
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12218.
  • Dahlström, Lisen Arnheim, et al. (författare)
  • Prospective seroepidemiologic study of human papillomavirus and other risk factors in cervical cancer
  • 2011
  • Ingår i: Cancer Epidemiology, Biomarkers and Prevention. - 1055-9965 .- 1538-7755. ; 20:12, s. 2541-2550
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Several sexually transmitted infections (STI) have been reported to interact with human papillomavirus (HPV) in the etiology of cervical cancer. A large cohort study is required to obtain a both unbiased and stable estimate of their effects. Methods: Four major biobanks in the Nordic Countries containing samples from about 1,000,000 subjects were linked with nation-wide cancer registries. Serum samples from 604 women with invasive cervical cancer (ICC) diagnosed on average 10 years after sampling and 2,980 matched control women were retrieved and analyzed with serology for key STI. Results: Exposure to HPV16 was the strongest risk factor for cervical cancer [ OR = 2.4; 95% confidence interval (CI), 2.0-3.0], particularly for squamous cell carcinoma (OR = 2.9; 95% CI, 2.2-3.7). HPV18 was strongly associated with increased risk for adenocarcinoma (OR = 2.3; 95% CI, 1.3-4.1). Baseline seropositivity for HPV16 did not confer any increased risk for HPV18 DNA-positive cancer and conversely HPV18 seropositivity had no association with HPV16 DNA-positive cancers. HPV6 had no effect on its own (OR = 1.1; 95% CI, 0.9-1.3), but had an antagonistic effect on the risk conferred by HPV16 (P < 0.01). Herpes simplex virus 2 had little or no association (OR = 1.1; 95% CI, 0.8-1.4). Previous exposure to Chlamydia trachomatis, as indicated by serum antibodies, had a strongly increased risk for cervical cancer (OR = 1.9; 95% CI, 1.5-2.3). Conclusions: A large prospective study has assessed the role of different STIs in cervical cancer. Impact: Prospective evidence supports cofactor role of some STI in cervical cancer. Cancer Epidemiol Biomarkers Prev; 20(12); 2541-50. (C) 2011 AACR.
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12219.
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12220.
  • Dalene Skarping, Ida, et al. (författare)
  • Neoadjuvant breast cancer treatment response; tumor size evaluation through different conventional imaging modalities in the NeoDense study
  • 2020
  • Ingår i: Acta Oncologica. - 1651-226X. ; 59:12, s. 1528-1537
  • Tidskriftsartikel (refereegranskat)abstract
    • Neoadjuvant chemotherapy (NACT) is offered to an increasing number of breast cancer (BC) patients, and comprehensive monitoring of treatment response is of utmost importance. Several imaging modalities are available to follow tumor response, although likely to provide different clinical information. We aimed to examine the association between early radiological response by three conventional imaging modalities and pathological complete response (pCR). Further, we investigated the agreement between these modalities pre-, during, and post-NACT, and the accuracy of predicting pathological residual tumor burden by these imaging modalities post-NACT.
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