A mnemonic for remembering the symmetric vs asymmetric causes of sacroiliitis is:
- PAIR
Mnemonic
- P: psoriatic arthritis
- A: ankylosing spondylitis
- I: inflammatory bowel disease related
- R: reactive (e.g. reactive arthritis)
The asymmetric letters (P and R) are the asymmetric causes
The symmetric letters (A and I) are the symmetric causes.
(This mnemonic was developed by Dr Joe Donahue)