Yoshiro Fujita

Oct 1, 2023 | jrheum.org | Mari Yamamoto |Yoshiro Fujita |Bywaters lesion

Bywaters lesion is a cutaneous vasculitis seen in rheumatoid arthritis.1A 70-year-old man presenting with polyarthritis and finger papules visited our hospital. The patient had a 12-year history of polyarthritis, and bilateral ulnar deviation developed 5 years prior. Computed tomography indicated interstitial pneumonia, and blood work confirmed a rheumatoid factor level of 2708 (normal < 15) IU/mL and anticyclic citrullinated peptide antibody level of 114.5 (normal < 4.5) U/mL.