Mnemonics for remembering the causes of protrusio acetabuli include:
- PROTrusio acetabuli
- My PROTRUSIO
Mnemonics
PROTrusio acetabuli
Includes the most common causes
- P: Paget disease
- R: rheumatoid arthritis (and other arthritides such as osteoarthritis, ankylosing spondylitis, juvenile idiopathic arthritis, crystal arthropathy)
- O: osteomalacia, osteogenesis imperfecta
- T: trauma
My PROTRUSIO
The complete list:
- My: Marfan syndrome
- P: Paget disease or primary protrusio acetabuli
- R: rheumatoid arthritis
- O: osteogenesis imperfecta
- T: trauma (or tumor locally / tumor causing osteomalacia: rare)
- R: rickets
- U: unknown (idiopathic)
- S: (p)soriatic arthritis (or sickle cell anemia: rare)
- I: inflammatory arthritis (ankylosing spondylitis) (or infection: rare)
- O: osteomalacia
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