The validity and magnitude of an association between myositis and malignant disease continue to be debated. Such issues as the legitimacy of a myositis diagnosis and distinction among myositis subgroups in previous population-based studies remain unresolved.
Department of Clinical Epidemiology, Suite 41, Cabrini Medical Centre, 183 Wattletree Road, Malvern, Victoria, Australia 3144. rachelle.buchbinder@med.monash.edu.au