2023
DOI: 10.1177/18632521221149054
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Osteochondritis dissecans of the knee: Imaging, instability concept, and criteria

Abstract: Osteochondritis dissecans of the knee is an idiopathic, focal, subchondral-bone abnormality that can cause instability or detachment of a bone fragment and overlying articular cartilage, with subsequent progression to osteoarthritis. The degree of lesion instability is best assessed by magnetic resonance imaging. Unstable lesions require operative management with fragment fixation. Level of evidence: V.

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Cited by 5 publications
(4 citation statements)
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“…It is important to distinguish knee OCD from the normal variation in irregular contours on the posterior femoral condyle, which is commonly observed in patients with open growth plates (physes), particularly between the ages of 6 and 10. Unlike OCD, this normal irregularity does not exhibit a surrounding sclerotic rim and tends to become less pronounced over time [40].…”
Section: Radiographymentioning
confidence: 95%
See 1 more Smart Citation
“…It is important to distinguish knee OCD from the normal variation in irregular contours on the posterior femoral condyle, which is commonly observed in patients with open growth plates (physes), particularly between the ages of 6 and 10. Unlike OCD, this normal irregularity does not exhibit a surrounding sclerotic rim and tends to become less pronounced over time [40].…”
Section: Radiographymentioning
confidence: 95%
“…The "Oreo cookie sign" in MRI imagery is characterized by a curvilinear hyperintense T2 signal at the interface of the progeny and the parent bone (resembling the cream of an Oreo cookie), flanked by two layers of hypointense signals (similar to the cookie wafers). The presence of focal cysts at the interface between the progeny and the parent bone indicates a more chronic condition [40].…”
Section: Magnetic Resonance Imagingmentioning
confidence: 99%
“…In T1-weighted images, the progeny is typically hypointense, this sequence allows for a detailed analysis of the bone signal and provides measurements for lesion size. In T2-weighted images, the progeny is mostly heterogeneous; this sequence can assess the integrity of articular cartilage, reactive marrow edema in the parent bone, and fluid or cystic changes at the parent-progeny interface [ 45 , 64 ]. The existence of cysts at the interface between the progeny and parent bone indicates OCD chronicity [ 64 ].…”
Section: Clinical Presentation and Diagnosismentioning
confidence: 99%
“…In T2-weighted images, the progeny is mostly heterogeneous; this sequence can assess the integrity of articular cartilage, reactive marrow edema in the parent bone, and fluid or cystic changes at the parent-progeny interface [ 45 , 64 ]. The existence of cysts at the interface between the progeny and parent bone indicates OCD chronicity [ 64 ].…”
Section: Clinical Presentation and Diagnosismentioning
confidence: 99%