Causes of sacroiliitis - symmetric vs asymmetric (mnemonic)
A mnemonic for remembering the symmetric vs asymmetric causes of sacroiliitis is:
- P: psoriatic arthritis
- A: ankylosing spondylitis
- I: inflammatory bowel disease related
- R: 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.
(This mnemonic was developed by Dr Joe Donahue)