Anemia
Patients with rheumatoid arthritis may also have different hematologic problems, including anemia. This type of anemia is called anemia of chronic disease or anemia of chronic inflammation. It is often asymptomatic and typically caused by an iron deficiency. Around half of patients with rheumatoid arthritis are expected to develop this type of anemia, and other hematologic problems may also arise, including thrombocytosis and leukocytosis (a higher count of platelets or leukocytes, respectively).