To study the relationship of polymyositis (PM) and dermatomyositis (DM) and cancer in Finland.
The medical records of 175 patients with PM and 71 with DM diagnosed between 1969 and 1985 were reviewed.
The patients were followed until death or until December 30,1990 through the files of Statistics Finland and the Finnish Cancer Registry.
Thirty-four cases of cancer were found [standardized incidence ratio (SIR) 2.1,95% confidence interval 1.4-2.9]. In the PM group the SIR was 1.0 (95% CI 0.5-1.8), and in the DM group 6.5 (95% CI 3.9-10).
The relative risk of cancer among DM cases was very high (SIR 26,12-48) in the first year after DM diagnosis.
DM is associated with cancer, but not PM.
The risk is high among patients with DM older than 49.
Cytotoxic drugs given to DM patients did not increase the risk of malignancies.
DM and certain cancers seem to share etiological factors.
Mots-clés Pascal : Dermatomyosite, Homme, Polymyosite, Tumeur maligne, Finlande, Europe, Registre, Epidémiologie, Association, Facteur risque, Peau pathologie, Tissu conjonctif pathologie, Maladie autoimmune, Immunopathologie, Muscle strié pathologie, Maladie système
Mots-clés Pascal anglais : Dermatomyositis, Human, Polymyositis, Malignant tumor, Finland, Europe, Register, Epidemiology, Association, Risk factor, Skin disease, Connective tissue disease, Autoimmune disease, Immunopathology, Striated muscle disease, Systemic disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0423317
Code Inist : 002B07. Création : 01/03/1996.