Adult-onset Still’s disease is a rare type of arthritis that is thought to be autoummune or autoinflammatory. It has similar symptoms to systemic-onset juvenile idiopathic arthritis -- fever, rash and joint pain. It begins in adulthood, so it's compared to rheumatoid arthritis. . Adult-onset Still’s disease, sometimes known as AOSD, is a rare type of inflammatory arthritis. As the name suggests, it can only be diagnosed in adults. Its name comes from another .
You can get rheumatoid arthritis (RA) at any age, but it’s most likely to show up between ages 30 and When it starts between ages 60 and 65, it’s called elderly-onset RA or late-onset .