Mnemonic for symmetric vs. asymmetric causes of sacroiliitis


Mnemonic for symmetric vs. asymmetric causes of sacroiliitis

PAIR

Psoriatic arthritis
Ankylosing spondylitis
Inflammatory bowel related
Reactive (e.g. Reiter syndrome)

The outside letters P & R (letters are far apart) are the asymmetric causes and the inside letters A & I (letters are close together) are the symmetric causes.
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