Document Detail

Use of azathioprine for non-thymoma myasthenia and risk of cancer: a nationwide case-control study in Denmark.
MedLine Citation:
PMID:  23448676     Owner:  NLM     Status:  Publisher    
BACKGROUND AND PURPOSE: To evaluate the association between the use of azathioprine and risk of cancer in patients with non-thymoma myasthenia gravis (MG) in a nationwide setting. METHODS: Case-control study based on population-based registries. Cases were patients with MG with a first time diagnosis of cancer (except non-melanoma skin cancer) registered during 2000-2009, and controls were patients with MG with no history of cancer. Prior use of azathioprine in cases and controls was assessed through prescription records (1995-2009). We used unconditional logistic regression to calculate odds ratios (ORs) with 95% confidence intervals (CIs) for cancer associated with a high cumulative dose [≥ 1000 defined daily doses (DDD)] or long-term use (≥ 5 years) of azathioprine, compared with never use of the drug and adjusted for potential confounders. RESULTS: We identified 89 cases and 873 controls. The prevalence of ever use of azathioprine was similar among cases (39.3%) and controls (39.4%). We observed a slightly elevated OR for cancer overall associated with long-term use of azathioprine (1.22; 95% CI: 0.62-2.40, P = 0.56). The highest ORs were observed for use of 2000 DDD or more of azathioprine; however, these risk estimates were based on small numbers. CONCLUSIONS: Use of azathioprine in patients with non-thymoma MG may be associated with a slightly increased risk of cancer overall. Larger studies are necessary to address the risk of site-specific cancers.
E G Pedersen; A Pottegard; J Hallas; S Friis; K Hansen; P E H Jensen; D Gaist
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-28
Journal Detail:
Title:  European journal of neurology : the official journal of the European Federation of Neurological Societies     Volume:  -     ISSN:  1468-1331     ISO Abbreviation:  Eur. J. Neurol.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-3-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9506311     Medline TA:  Eur J Neurol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013 The Author(s) European Journal of Neurology © 2013 EFNS.
Department of Neurology, Faculty of Health Sciences, Institute of Clinical Research, Odense University Hospital, University of Southern Denmark (SDU), Odense, Denmark.
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