Figure 1

Figure 1

Hand radiographs to illustrate features of erosive arthropathies. (A) Patient with tophaceous gout, (B) detail to show erosions with overhanging margins and adjacent soft tissue opacities (arrows) with complete disc location of the first metacarpophalangeal (MCP) joint due to bone lysis and erosion (circle) (C) Patient with rheumatoid arthritis (D) detail to show marginal erosions with cartilage loss at the typical sites of second and third MCP joints (E) patient with psoriatic arthritis and predominant distal interphalangeal (DIP) joint involvement (F) detail to show erosion and bony proliferation at DIP joints (arrows) (G) patient with erosive osteoarthritis (H) detail to show subchondral erosion and ‘gull wing’ bony proliferation (circle).