Funding sources None.
Clinical and Laboratory Investigations
Meta-analysis of the association of dermatomyositis and polymyositis with cancer
Article first published online: 10 OCT 2013
© 2013 British Association of Dermatologists
British Journal of Dermatology
Volume 169, Issue 4, pages 838–847, October 2013
How to Cite
Wang, J., Guo, G., Chen, G., Wu, B., Lu, L. and Bao, L. (2013), Meta-analysis of the association of dermatomyositis and polymyositis with cancer. British Journal of Dermatology, 169: 838–847. doi: 10.1111/bjd.12564
Conflicts of interest None declared.
- Issue published online: 10 OCT 2013
- Article first published online: 10 OCT 2013
- Accepted manuscript online: 2 AUG 2013 01:42AM EST
- Manuscript Accepted: 13 JUN 2013
Although some features of dermatomyositis (DM) and polymyositis (PM) have been reported as possible prognostic indicators for cancer development, previous studies were small in size and were unable to establish a definitive relationship between neoplasms and DM and PM.
To evaluate risk factors for developing malignancies in patients with DM and PM.
Meta-analysis of the studies reported in the literature was performed to unveil risk factors for developing cancer among patients with DM and PM. The included studies were either cohort or retrospective case–control studies with information on cancer status. Risk for malignancy was determined as the odds ratio (OR) or weighted mean difference (WMD) with a 95% confidence interval (CI), determined by fixed and random effects models. Stata 10.0 software was used to identify possible publication bias.
Twenty studies with 380 patients and 1575 controls were included in the analysis. The factors that may increase the risk of cancer in patients with DM and PM were older age (WMD 11·41, 95% CI 9·84–12·98), male sex (OR 1·92, 95% CI 1·49–2·48), cutaneous necrosis (OR 5·52, 95% CI 3·49–8·74) and dysphagia (OR 2·41, 95% CI 1·50–3·86), whereas those that may provide protection against cancer included arthritis (OR 0·38, 95% CI 0·24–0·61) and interstitial lung disease (OR 0·32, 95% CI 0·20–0·51).
Our data suggest that age, sex, cutaneous necrosis, dysphagia, arthritis and lung complications may influence susceptibility to cancer in patients with DM and PM.