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Correlation Between Arthro-MRI Results And Intraoperative Hip Arthroscopy Findings In Fai Syndrome


Alexander Zimmerer, MD
GERMANY

Correlation Between Arthro-MRI Results And Intraoperative Hip Arthroscopy Findings In Fai Syndrome

Christian Sobau, MD, GERMANY Konstantinos Tramountanis, MD, GERMANY Wolfgang Miehlke, MD, GERMANY Alexander Zimmerer, MD, GERMANY

ARCUS Sportklinik, Pforzheim, GERMANY

2021 Congress   ePoster Presentation     Not yet rated

 

Anatomic Location

Hip / Groin / Thigh

Diagnosis / Condition

Impingement

Treatment / Technique

Arthroscopy

Anatomic Structure

Capsuloligamentous Complex Cartilage Labrum

Diagnosis Method

Arthro-MRI

Labrum

Labrum Tears

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Summary: Arthro-MRI showed good sensitivities for both cartilage and all labrum lesions, so that a preoperative Arthro-MRI can provide important information regarding the present pathologies and should therefore be performed routinely.

Background

In recent years, hip arthroscopy has established itself as the gold standard in the treatment of FAI syndrome. Arthro-MRI of the affected hip joint should be performed as standard for preoperative diagnosis. The aim of the study was to establish a correlation between Arthro-MRI and arthroscopic findings.

Methods

Based on our in-house database, all patients who received Arthro-MRI and subsequent arthroscopic therapy for FAI syndrome in our clinic between January 2014 and December 2015 were identified. In these patients the Arthro-MRI findings were retrospectively compared with the intraoperative findings and sensitivity/specificity as well as positive and negative predictive values for labrum and cartilage damage were calculated.

Results

During this period, 138 patients received Arthro-MRI in our clinic with following arthroscopic therapy of FAI syndrome. A sensitivity of 84% (CI 95% interval: 78 - 90%) and a specificity of 37% (CI 95% interval: 29 - 45%) could be calculated for cartilage damage. The PPW was 83%, the NPW 36%.

A sensitivity of 84% (CI 95% interval: CI 95% interval: 77 - 90%) and a specificity of 37% (CI 95% interval: 27 - 42%) could be found for all labrum lesions. The PPW was 75%, the NPW 51%.

A subgroup analysis according to the Czerny classification showed specificities between 88% (stage 1), 80% (stage 2) and 100% (stage 2) for each stage of the labrum lesion. The corresponding sensitivities were 57% (stage 1), 69% (stage 2) and 15% (stage 3).

Conclusion

Arthro-MRI showed good sensitivities for both cartilage and all labrum damage with correspondingly reduced specificities. The subgroup analysis of the labrum damage showed high specificities, so that a preoperative Arthro-MRI can provide important information regarding the present pathologies and should therefore be performed routinely.

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