1️⃣ MRI Signs of PCL Tear:
- Focal disruption of the PCL.
- Amorphous increased signal intensity with disruption of one or both margins of the ligament.
- Increased signal intensity on proton density images is more common than on T2-weighted images.
- Nonvisualization of the PCL.
- Abnormal thickening of the PCL distal to the genu with an anteroposterior diameter of greater than 7 mm. (Magn Reson Imaging Clin N Am. 2014 Nov;22(4):557-80.)
2️⃣ PCL Injury Patterns:
- Injury to the PCL may result in transverse or longitudinal interstitial tears. (Radiology. 2016 Oct;281(1):23-40)
✅ Interstitial Tears: The anteroposterior diameter of the ligament distal to the genu is greater than 7 mm on a sagittal T2-weighted sequence.
✅ Transverse Tears: Focal disruption of the PCL.
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