Review Question - QID 1266

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PCL Injury Prognosis Chronic PCL deficiency QID: 1266 (OBQ04.161)

QID 1266 (Type "1266" in App Search)

A 35-year-old male sustained an isolated PCL injury over 5 years ago which was treated non-operatively. If his follow-up radiographs show degenerative changes related to his PCL-deficiency, the changes are likely to be present in which of the following knee compartments?

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medial and patellofemoral

60%

1921/3203

medial only

262/3203

lateral

244/3203

lateral and patellofemoral

15%

492/3203

patellofemoral only

256/3203

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A PCL deficient knee has an increased risk of early onset of degenerative changes in the medial and patellofemoral compartments.

Strobel et al conducted a retrospective arthroscopic review of 181 PCL-deficient knees that were treated nonoperatively initially but later underwent knee arthroscopy. They found that PCL insuffiency significantly increased the risk of developing medial femoral condyle and patellar cartilage degeneration over time. Of the patients whose PCL-deficiency was present for more than 5 years, 77.8% showed degenerative cartilage lesions of the medial femoral condyle and 46.7% showed cartilage degeneration of the patella. After 1 year of PCL insufficiency, the number of medial femoral cartilage lesions increased threefold (13.6% v 39.1%).