This book contains the essential information required by physicians and bench scientists to understand the definition of a given autoimmune disease and its diagnostic criteria and treatment. Autoimmune diseases are a family of more than one hundred 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 Autoimmune Disease Diagnosis: Systemic and Organ-specific Diseases, the editors have gathered a critical review by renowned experts of more than 120 autoimmune diseases. A contemporary overview of these conditions with special emphasis on diagnosis is presented. This edition of  Autoimmune Disease Diagnosis  is divided into two parts, the first covering systemic autoimmune diseases, and the second covering organ-specific autoimmune diseases. They cover all the newly approved classification criteria, such as those for systemic lupus erythematosus, antiphospholipid syndrome, several systemic vasculitis, etc. This edition also reviews newly described systemic autoimmune conditions: immune-mediated necrotizing myopathy, VEXAS, immunoglobulin G4-associated autoimmune disease, autoimmune/autoinflammatory syndrome induced by adjuvants (ASIA), and autoimmune manifestations induced by immune-therapies. Several organ-specific diseases have been added, including autoimmune alopecia and other immune-mediated dermatosis, autoimmune encephalitis, and autoimmune dysautonomia, among others. This is an essential guide to the diagnosis of autoimmune diseases for internists, rheumatologists, clinical immunologists, primary care physicians, and bench scientists.