Which of the following is NOT an extraarticular symptom of rheumatoid arthritis?

In the context of rheumatoid arthritis, extraarticular symptoms refer to those that occur outside of the joints. Common extraarticular manifestations include systemic symptoms such as anorexia, weight loss, and fatigue, which are often found in individuals suffering from the disease. They are indicative of the body's inflammatory response due to rheumatoid arthritis.

Joint inflammation, on the other hand, is a primary and defining characteristic of the disease itself and occurs at the site of the synovial joints. It is caused by the immune system attacking the synovium, leading to pain, swelling, and stiffness in the affected joints. Since joint inflammation is directly related to the disease pathology, it is not classified as an extraarticular symptom, making it the correct distinction in this question.

Thus, while anorexia, weight loss, and fatigue are systemic issues that can impact overall health, joint inflammation specifically pertains to the local joint tissues involved in rheumatoid arthritis and is not considered extraarticular.