Plain radiograph of mild metacarpophalangeal joint erosion rheumatoid arthritis

The plain x-ray of the left hand is from a patient with radiologically mild rheumatoid arthritis. The magnified view of the second metacarpophalangeal joint in (A) is shown with arrows in (B). Subtle erosive changes are noted at the second metacarpophalangeal joint (arrow), while soft tissue changes are more obvious (arrowheads).