 The purpose of the study is to obtain preliminary data regarding the safety and tolerability of etanercept in DM. In addition, we will use the study to assess the variability, reliability, and responsiveness of the core set of outcome measures recommended by IMACS. The study will be performed under the aegis of the Muscle Study Group MSG, consisting of experienced investigators with an avid interest in myopathies. The ultimate goal of this pilot study will be to obtain necessary, prerequisite information important in designing future therapeutic trials of etanercept and other agents in patients with DM. The specific aims of the study are: 