Pediatric Psoriatic Arthritis

  • Etiology:
  • Imaging Radiograph:
    — Enthesitis and marginal bone erosions leading to pencil-in-cup deformities
    — Bone proliferation resulting in irregular appearance of bone around affected joint
    — Joint subluxation
    — Interphalangeal ankylosis
    — Periostitis
    — Dactylitis – soft tissue swelling of whole digit
    — Acro-osteolysis
    — Sacroiliitis
  • DDX:
  • Complications:
  • Treatment:
  • Clinical:

Radiology Cases of Psoriatic Arthritis

Foot radiograph of psoriatic arthritis
AP radiographs of the feet show interphalangeal ankylosis and joint subluxation at the middle and distal interphalangeal joints in multiple phalanges bilaterally.
Radiograph of pediatric sacroiliitis
AP radiograph of the sacrum shows sclerosis and narrowing of the right sacroiliac joint. The left sacroiliac joint is normal.