✅ Knee MRI Mastery/Chap 2.ACL and PCL

(Fig 2-E.20) PCL Deficient Knee with Delayed Imaging

MSK MRI 2024. 3. 18. 22:04

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1️⃣ Chronic PCL Tears: MR Imaging Insights

✅MR imaging for chronic PCL injuries is less reliable, often confusing ligament continuity with partial or no tears. Identifying chronic partial tears is difficult, even with clinical indicators.

Source: Radiology, Oct 2016; 281(1):23-40.

✅ Chronic PCL damage may show ligament thickening or elongation, with abnormal shape but seldom discontinuity.

Source: Magn Reson Imaging Clin N Am, May 2022; 30(2):261-275.

✅In studies, 28% of chronic PCL injuries appeared nearly normal on MRI, while 44% showed ligament continuity with morphologic abnormalities.

Source: Magn Reson Imaging Clin N Am 2014; 22:557–580.

 

2️⃣ Chronic PCL Injuries and Associated Chondral Lesions: 

✅ About 80% of chronic cases exhibit chondral lesions on the medial femoral condyle and patellofemoral areas. 

✅ Patients tend to lock their knees in extension to prevent posterior tibial translation, potentially leading to patellofemoral chondral changes over time.

Source: Radiology, Oct 2016; 281(1):23-40.

 

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