Key result
Magnetic resonance arthrography showed limited diagnostic accuracy for labral tears (sensitivity 81%, specificity 51%) and chondral wear (sensitivity 17%, specificity 100%) versus arthroscopy.
Why the study?
What is the diagnostic accuracy of MRA compared to hip arthroscopy for detecting labral tears and chondral wear in patients with femoroacetabular impingement?
Observational (n=69)
No
What is the diagnostic accuracy of MRA compared to hip arthroscopy for detecting labral tears and chondral wear in patients with femoroacetabular impingement?
MRA demonstrated lower diagnostic accuracy for labral tears and chondral wear in femoroacetabular impingement than previously reported, with particularly poor sensitivity for chondral wear and poor specificity for labral tears.
Caution advised when using MRA for labral or chondral assessment in FAI; challenges prior accuracy estimates and leaves open optimal diagnostics.
Magnetic resonance arthrography (MRA) is a useful pre-operative investigation for patients with clinical signs and symptoms of femoroacetabular impingement. Our aim was to assess the diagnostic accuracy of MRA in detecting labral tears and chondral wear in this context. Sixty nine hips were included in the study after exclusions. All patients underwent pre-operative MRA and then subsequent hip arthroscopy. The findings at MRA were compared to those found intraoperatively. For labral tears, sensitivity, specificity and accuracy were 81%, 51% and 58% respectively. For chondral wear these figures were 17%, 100%, and 55% respectively. In our institution, MRA was therefore not as accurate as previously published work suggests.
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Banks et al. (2012) conducted an observational in Femoroacetabular impingement (n=69). Magnetic resonance arthrography (MRA) vs. Hip arthroscopy was evaluated on Diagnostic accuracy for labral tears and chondral wear. Magnetic resonance arthrography showed limited diagnostic accuracy for labral tears (sensitivity 81%, specificity 51%) and chondral wear (sensitivity 17%, specificity 100%) versus arthroscopy.
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