Challenge of the Week / Foot & Ankle / 08.23.19

A 30-year-old female patient with psoriasis presents with pain in the toes. Which of the following are the radiographic findings that are most consistent with psoriatic arthritis?

  • Sclerosis with subchondral cyst formation
  • This is often seen with post-traumatic arthritis.

  • Pencil-in-cup deformity of the digits
  • This results from periarticular erosions and bone resorption, giving the appearance of a pencil in a cup.

  • Diffuse resorption
  • This is typical of rheumatoid arthritis.

  • Multiple dislocated joints
  • This is typical of rheumatoid arthritis.