Sine syndromes (SSs) represent atypical forms of inflammatory rheumatic diseases, the courses of which are often severe. While the diagnosis of rheumatic diseases can be determined according to an established set of diagnostic criteria based on clinical characteristics and laboratory parameters, Sine Syndromes do not fulfill the standard criteria used to assist in the classification of patients with rheumatological disorders. This concise book gives an overview of atypical courses in common inflammatory rheumatic diseases such as Wegener’s granulomatosis, systemic sclerosis, Sjögren's syndrome, or systemic lupus erythematosus. Each chapter reviews similar cases reported in the literature and presents current data on treatment options. Drawing on their vast clinical experience, the editors provide a series of detailed case reports in order to illustrate the different types of disease. The book is intended to facilitate early diagnosis and effective therapy in patients where a schematic approach may not prove sufficient. Sine Syndromes in Rheumatology will serve as a useful and easily accessible reference for specialists in rheumatology as well as for practitioners in the fields of internal medicine, pediatrics, and orthopedics.