Glucocorticoid therapy has been used as an immunosuppressive and anti-inflammatory agent for treating multiple sclerosis and atherosclerosis; intravenous immunoglobulins therapy has been in use for treating common variable immunodeficiency patients; and MCSF pathway blockade therapy using human monoclonal antibodies against MCSF was in clinical trials for treating rheumatoid arthritis. The gene discussed is CSF1; the disease is rheumatoid arthritis.