Figure 2. MRI of the right hand showing T1-weighted sagittal (A), proton density with contrast (B), and T1-weighted post-contrast (C) views showing synovial enhancement, effusion, and periarticular edema surrounding the third right MCP joint.

(A) Joint capsule hyperenhancement is indicated by the white arrow, and subcutaneous hyperenhancement is indicated by the red arrow. (B) Synovial hyperenhancement is highlighted by the white arrow. (C) Effusion is shown by the white arrow.

MRI: magnetic resonance imaging; MCP: metacarpophalangeal