Fig. 1From: Psoriatic arthritis successfully treated with second-line anti-interleukin-6 treatment: a case report and review of the literature X-ray findings at the first visit. a Anteroposterior radiograph of the knee. Bone cyst formation in the lateral condyle of the femur (arrow) and joint destruction of the medial compartment (arrowhead). b Narrowing joint space of the left hip. c Pencil cup-like destruction of the distal interphalangeal joint (arrow) and destruction of the proximal interphalangeal joint (arrowhead)Back to article page