Which of the following is NOT a characteristic of rheumatoid arthritis?

Rheumatoid arthritis is primarily characterized by inflammation of the joints, which typically leads to several key symptoms. Stiffness, pain, and swelling are all hallmark features of this condition. Morning stiffness, in particular, is common and can last for an extended period, affecting the patient's mobility throughout the day.

Swelling occurs due to inflammation in the joints, resulting from the body's immune response attacking the synovium, leading to joint effusion and swelling. Pain is also prevalent in rheumatoid arthritis, often exacerbated by inflammation and joint damage.

Cramps, however, are not a characteristic symptom of rheumatoid arthritis. While muscle cramps can occur in various conditions or as a side effect of certain medications, they are not directly associated with the inflammatory processes or joint issues typical of rheumatoid arthritis. Therefore, the option related to cramps accurately reflects a symptom that is not characteristic of the disease.