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MRI model effectively determines capitellar osteochondritis dissecans lesion characteristics
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An MRI staging model utilized in a recent study was able to effectively estimate classification and instability of capitellar osteochondritis dissecans lesions.
Researchers evaluated capitellar osteochondritis dissecans (COCD) lesions in 52 patients via T2-weighted MRI. MRI results were classified into five stages: normally shaped capitellum with several spotted areas of high signal intensity lower (Stage 1) or higher (Stage 2) than that of cartilage; stage 2 with both discontinuity and noncircularity of the chondral surface signal of the capitellum and no high signal interface apparent between lesion and floor (Stage 3); lesion separated by a high intensity line in comparison with cartilage (Stage 4); and capitellar lesion displaced from floor or defect of capitellar lesion noted (Stage 5).
Classifications of lesions via MRI were compared with International Cartilage Repair Society (ICRS) classification to determine stability of the lesions. Sensitivity, specificity, and positive and negative predictive values were evaluated for fragment instability. Both intrarater and interrater correlations for MRI staging were also determined.
Preoperative MRI and ICRS classifications matched up in 49 patients (94%) with 100% sensitivity and 80% specificity.
The effectiveness of positive and negative predictive values were 93% and 100%, respectively, for diagnosing lesion instability. Intrarater and interrater reliability were both classified as high, according to the researchers.
Disclosure: The authors have no relevant financial disclosures.
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