According to the Autoimmune Diseases Coordinating Committee (ADCC), between 14.7 and 23.5 million people in the USA – up to eight percent of the population are affected by autoimmune disease. Autoimmune diseases are a family of more than 100 chronic, and often disabling, illnesses that develop when underlying defects in the immune system lead the body to attack its own organs, tissues, and cells. In Handbook of Autoimmune Disease, the editors have gathered in a comprehensive handbook a critical review, by renowned experts, of more than 100 autoimmune diseases, divided into two main groups, namely systemic and organ-specific autoimmune diseases. A contemporary overview of these conditions with special emphasis on diagnosis is presented. Each chapter contains the essential information required by attending physicians as well as bench scientists to understand the definition of a specific autoimmune disease, the diagnostic criteria, and the treatment.