Cartilage Lesions in the Hip: Diagnostic Effectiveness of MR Arthrography
Autor: | Tobias F. Wyss, Marius R. Schmid, Hubert P. Nötzli, Marco Zanetti, Juerg Hodler |
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Rok vydání: | 2003 |
Předmět: |
Adult
Cartilage Articular Male musculoskeletal diseases medicine.medical_specialty Articular cartilage Sensitivity and Specificity Diagnosis Differential Mr arthrography Predictive Value of Tests Positive predicative value medicine Humans False Positive Reactions Radiology Nuclear Medicine and imaging Femoroacetabular impingement Retrospective Studies Hip surgery medicine.diagnostic_test business.industry Cartilage Magnetic resonance imaging Middle Aged medicine.disease Magnetic Resonance Imaging Acetabulum medicine.anatomical_structure Female Hip Joint Radiology business |
Zdroj: | Radiology. 226:382-386 |
ISSN: | 1527-1315 0033-8419 |
Popis: | To evaluate the diagnostic performance of magnetic resonance (MR) arthrography in the detection of articular cartilage lesions in patients suspected of having femoroacetabular impingement and/or labral abnormalities.Forty-two MR arthrograms obtained in 40 patients with a clinical diagnosis of femoroacetabular impingement and/or labral defect were retrospectively analyzed. Two readers independently interpreted the images for cartilage lesion location, depiction, and characteristics. Within 6 months after MR arthrography, each patient underwent open hip surgery, during which the entire cartilage of the hip joint was inspected. Sensitivity, specificity, accuracy, and positive and negative predictive values were calculated. kappa values were calculated to quantify the level of interobserver agreement.At surgery, most (37 [88%] of 42) cartilage defects were identified in the anterosuperior part of the acetabulum. In 23 (55%), 12 (29%), 10 (24%), and 10 (24%) hips, lesions were found in the posterosuperior acetabulum, anteroinferior acetabulum, posteroinferior acetabulum, and femoral head, respectively. The sensitivities and specificities of MR arthrographic detection of cartilage damage in all regions combined were 79% (73 of 92 regions) and 77% (91 of 118 regions), respectively, for reader 1 and 50% (46 of 92 regions) and 84% (99 of 118 regions), respectively, for reader 2. At interobserver comparison, agreement was fair (kappa = 0.31) for detection of cartilage lesions in the femoral head and poor (kappaor= 0.2) for detection of lesions in all acetabular regions.Cartilage lesions are common in young and middle-aged patients with femoroacetabular impingement and/or labral abnormalities and are most frequently found in the anterosuperior part of the acetabulum. 2003 |
Databáze: | OpenAIRE |
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