Are extra-labral MR findings useful in the diagnosis of a labral tear?

Daniel Saddik, Phillip Tran, John Troupis, Phillip Tirman, John O'Donnell, Robert Howells, Stephen Farish, Con Tartaglia

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2 Citations (Scopus)

Abstract

Objective: To determine diagnostic performance statistics of extra-labral magnetic resonance (MR) findings for detection of labral tears in a population of patients with clinical suspicion of this diagnosis. Materials and Methods: Seventy-nine patients clinically suspected of having a labral tear (who underwent arthroscopy) had their MR studies retrospectively reviewed to determine the presence of lateral acetabular oedema-like marrow signal, ganglia, dysplastic femoral bumps, synovial herniation pits and geodes. These findings were then correlated with the arthroscopic presence (or absence) of a labral tear. Results: All findings (lateral acetabular oedema-like marrow signal, ganglia, dysplastic femoral bumps, synovial herniation pits and geodes) had a specificity and positive predictive value (PPV) of 100%. Lateral acetabular oedemalike marrow signal had a sensitivity of 35% and 20% negative predictive value (NPV). This was the only statistically significant finding (P < 0.05). The sensitivity and NPV of ganglia were 12% and 16%, dysplastic femoral bumps (12%, 16%), synovial herniation pits (4%, 14%) and geodes (6%, 15%) respectively, (P > 0.05). Conclusion: Lateral acetabular oedema-like marrow signal is a useful sign (100% PPV) in the MR diagnosis of a labral tear, if one is clinically suspected. The other findings (ganglia, dysplastic femoral bumps, synovial herniation pits and geodes) were not statistically significant. Further studies are required to evaluate these.

Original languageEnglish
Pages (from-to)255-260
Number of pages6
JournalJournal of Medical Imaging and Radiation Oncology
Volume56
Issue number3
DOIs
Publication statusPublished - Jun 2012
Externally publishedYes

Keywords

  • Hip
  • Labral tear
  • Magnetic resonance imaging
  • Musculoskeletal imaging

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