For 10 points, name this disease that causes inflammation of joints and is distinct from a similar "osteo-" disease.
The anti-CCP test and anti-MCV assay are methods of finding an antibody associated with this disease, and the PTPN22 gene can double a person's risk of getting this disease. The classification criteria for diagnosing this disease includes determining the prevalence of anti-citrullinated protein antibody, or ACPA. DMARDs are drugs which can be used to slow the progress of this disease. This disease is characterized by the presence of autoantibodies that are antibodies against the Fc regions of IgG. Those autoantibodies are this disease's namesake factor. This disease is associated with thickening of the (*) synovial membrane. This disease can be distinguished from a similar disease because it causes periods of stiffness that are typically longer than an hour. And unlike that other disease, the affected areas can turn hot and red and are actually inflamed instead of merely swollen. For 10 points, name this disease that causes inflammation of joints and is distinct from a similar "osteo-" disease. 
The anti-CCP test and anti-MCV assay are methods of finding an antibody associated with this disease, and the PTPN22 gene can double a person's risk of getting this disease.
rheumatoid arthritis [or  RA; do not accept or prompt on osteoarthritis; prompt on partial answer]