Causes of sacroiliitis - symmetric vs asymmetric (mnemonic)

Last revised by Andrew Murphy on 23 Mar 2023

A mnemonic for remembering the symmetric vs asymmetric causes of sacroiliitis is:

  • PAIR


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)

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