This book is dedicated to our readers with the intention of providing an informative exposition of the myositis syndromes. It is also presented in the hope that perhaps it may serve to inspire and stimulate discussion and research into these disabling disorders. Included are descriptions of clinical features, differential diagnosis, pathogenetic mechanisms, and approaches to therapy. Current concepts of classi- cation and diagnostic techniques are also presented. The production staff at Humana Springer, especially Ms. F. Louie and Ms. C. Walsh, have been instrumental and invaluable in...