Rheumatoid Arthritis and Myositis Cohort

The primary objective of this research is to establish a well characterized clinical and longitudinal cohort for individuals with Rheumatoid Arthritis (RA) and Myositis to create a place to maintain blood, urine, stool specimens, excess tissue from procedures, and clinical data, which may be accessed for future research purposes.Specific research objectives of this cohort include:Observe the response that immunosuppressive medications have on the immune cell population and cytokines in individuals with RA or Myositis.Observe the role that the intestinal microbiome has on the immune cell population and cytokines in individuals with RA or Myositis.Observe the connection between intestinal inflammation has on the immune cell population and cytokines in individuals with RA or Myositis.

Inclusion Criteria:Subjects must be 18 years or olderDiagnosed RA by a rheumatologist determined by the 2010 ACR/EULAR Classification Criteria.Diagnosed Myositis by a rheumatologist determined by the 2017 American College of Rheumatology Classification Criteria for Adult and Juvenile Idiopathic Inflammatory MyopathiesAble to read and write in English or SpanishExclusion Criteria:Subject is less than 18 years old