The mnemonic
Four named signs
What each word stands for
- McBurneyTenderness at McBurney's point
- RovsingLeft iliac fossa palpation causes right-sided pain
- PsoasPain on hip extension suggests a retrocaecal appendix
- ObturatorPain on internal rotation of the flexed hip suggests a pelvic appendix
Why it matters clinically
Positional signs hint at the appendix location and support the diagnosis.
Where it stops being reliable
Clinical signs are insensitive; scoring (Alvarado) and imaging add accuracy.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.