URMC / Encyclopedia / Content Search Encyclopedia Immune Disorders Many different immune disorders require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief overview. All About the Immune System Immune Deficiencies Disorders of the Immune System Genetics and Immune Disorders Immunotherapy Overview Dermatomyositis Immunoglobulin A Deficiency Langerhans Cell Histiocytosis Monoclonal Gammopathies Sjögren’s Syndrome Granulomatosis with Polyangitis (GPA)