Protrusio is a condition of the femoral ball migrating superiorly into the rim or acetabulum of the hip joint. It can be seen in rheumatoid arthritis. It can be congenital.
Protrusio Acetabuli in Rheumatoid Arthritis
Currier Mcewen22, Maxwell H. Poppel33, Nathaniel Poker44, Harold G. Jacobson55
Author Affiliations
Published Online:Jan 1 1956https://doi.org/10.1148/66.1.33
