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Cancer risk among patients with multiple sclerosis and their parents
Örebro University, School of Health and Medical Sciences.ORCID iD: 0000-0001-6328-5494
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2009 (English)In: Neurology, ISSN 0028-3878, E-ISSN 1526-632X, Vol. 72, no 13, 1170-1177 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: We investigated cancer risk among patients with multiple sclerosis (MS) and whether variation by age at MS diagnosis helps to elucidate mechanisms underlying the previously reported reduced cancer risk. We also studied cancer risk among parents to ascertain if MS susceptibility genes may confer protection against cancer in relatives. METHODS: Cox proportional hazards regression, adjusted for age, sex, area, and socioeconomic index, estimated cancer risk among 20,276 patients with MS and 203,951 individuals without MS, using Swedish general population register data. Similar analyses were conducted among 11,284 fathers and 12,006 mothers of patients with MS, compared with 123,158 fathers and 129,409 mothers of controls. RESULTS: With an average of 35 years of follow-up, there was a decreased overall cancer risk among patients with MS (hazard ratio = 0.91, 0.87-0.95). Increased risks were observed for brain tumors (1.44, 1.21-1.72) and urinary organ cancer (1.27, 1.05-1.53). Parents of patients with MS did not have a notably increased or decreased overall cancer risk. CONCLUSIONS: The reduction in cancer risk in patients with multiple sclerosis (MS) may result from behavioral change, treatment, or we speculate that some immunologic characteristics of MS disease activity improve antitumor surveillance. The lack of association among parents indicates that a simple inherited characteristic is unlikely to explain the reduced cancer risk among patients with MS. MS is associated with increased risk for some cancers, such as of urinary organs and brain tumors (although surveillance bias may be responsible).

Place, publisher, year, edition, pages
Minneapolis, Minn.: Lancet Publications Inc. , 2009. Vol. 72, no 13, 1170-1177 p.
National Category
Medical and Health Sciences Neurology Cancer and Oncology
Research subject
Neurology
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URN: urn:nbn:se:oru:diva-11646DOI: 10.1212/01.wnl.0000345366.10455.62PubMedID: 19332695OAI: oai:DiVA.org:oru-11646DiVA: diva2:345860
Available from: 2010-08-27 Created: 2010-08-27 Last updated: 2017-12-12Bibliographically approved

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Montgomery, Scott M.

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