| Rheumatology is a medical specialty concerned with the study, diagnosis, and treatment of various conditions that involve pain or other symptoms afflicting bone, joints, and/or muscles (musculoskeletal system). Rheumatologists treat arthritis, certain autoimmune diseases, musculoskeletal pain disorders, and osteoporosis. There are more than 100 types of these diseases, including rheumatoid arthritis, osteoarthritis, gout, lupus, back pain, fibromyalgia, and tendonitis. |  | Ioana Cristiana Stanescu, MD |