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Methotrexate Treatment and Risk for Cutaneous Malignant Melanoma - a Retrospective Comparative Registry-based Cohort Study.

Artikel i vetenskaplig tidskrift
Författare Sam Polesie
Martin Gillstedt
Henrik H. Sönnergren
Amra Osmancevic
John Paoli
Publicerad i The British journal of dermatology
Volym 176
Nummer/häfte 6
Sidor 1492–1499
ISSN 1365-2133
Publiceringsår 2017
Publicerad vid Institutionen för kliniska vetenskaper, sektionen för onkologi, radiofysik, radiologi och urologi, Avdelningen för dermatologi och venereologi
Sidor 1492–1499
Språk en
Länkar dx.doi.org/10.1111/bjd.15170
www.ncbi.nlm.nih.gov/entrez/query.f...
Ämnesord methotrexate, melanoma
Ämneskategorier Dermatologi och venereologi

Sammanfattning

Methotrexate (MTX) is frequently used as an immunosuppressive drug in inflammatory diseases. It is controversial and not thoroughly investigated whether MTX increases the risk of cutaneous malignant melanoma (CMM).The aim of the present study was to investigate whether MTX-exposure increases the risk for CMM.A retrospective cohort study was conducted using statistics from The National Board of Health and Welfare. All patients over 18 years in the time period August 2005 to December 2014 that were dispensed with MTX from Swedish pharmacies were registered (n=101,966). For every MTX-exposed patient, five age- and sex-matched patients who had been dispensed a random drug other than MTX, during the same time period were randomly selected (n=509,279). The lists were matched with the Swedish Cancer Registry.Overall a small but statistically significant (P < 0.001) risk increase for CMM was observed in MTX-exposed patients compared to patients without MTX-exposure. The Kaplan-Meier estimates for the 5-year risk of CMM was 0.48% (95% CI: 0.43% - 0.53%) in the MTX-exposed group and 0.41% (95% CI: 0.39% - 0.43%) in the MTX-unexposed group. However, in a subgroup analysis, the difference between the groups was only preserved in women older than 70 years at treatment start. Moreover, there was no significant difference in incidences between the MTX-exposed and MTX-unexposed patients in the time period.Our results suggest a small but significant increase in risk for CMM in patients treated with MTX. However, the risk increase observed was considerably lower than earlier observations. This article is protected by copyright. All rights reserved.

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