Fig. 1.

Hand radiograph from PsA patient demonstrating both new bone forming and resorptive features [12]

Close up of plain radiograph of left hand from patient with PsA showing a destructive mutilating process affecting the interphalangeal joint of the left thumb that has resulted in subluxation. There is also evidence of new bone formation with periostitis along the shaft of the distal phalange of the thumb and ankylosis of the second distal interphalangeal joint.