Bilateral, often asymmetrical, sacroiliitis
Widening of the joint margin and sclerosis, although this is less common in psoriatic arthritis than in ankylosing spondylitis
Squaring of the lumbar vertebrae in the lumbar spine is less common in psoriatic arthritis than in ankylosing spondylitis, whereas paravertebral ossifications not attached to the vertebral margins is more common in patients with psoriatic arthritis.
Learn more about the use of imaging in psoriatic arthritis.
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Cite this: Herbert S. Diamond. Fast Five Quiz: Psoriatic Arthritis Imaging - Medscape - Feb 01, 2022.