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1️⃣ Mucoid Degeneration of the PCL
- Diagnosis Criteria: Mucoid degeneration of the PCL should be diagnosed when the ligament is intact and thickened, with increased signal intensity on fluid-sensitive sequences. This is especially relevant in patients with no history of trauma or knee injury and no clinical signs of ligamentous instability.
Source: Acta Radiologica, March 2017; 58(3):338-343.
- Characteristic Appearance: Intrasubstance mucoid degeneration of the PCL can demonstrate a striated “tram-track” appearance with thickening that might mimic a tear.
Source: Magnetic Resonance Imaging Clinics of North America, 2014; 22:557–580.
2️⃣ Mucoid Degeneration vs. Partial Tear
- Differentiation: Mucoid degeneration may be confused for a PCL injury, but the normal course of fibers along with the presence of low-signal-intensity margins are key distinguishing features.
Source: Magnetic Resonance Imaging Clinics of North America, May 2022; 30(2):261-275.
- Key Observation: In intrasubstance mucoid degeneration of the PCL, which results in a “tram-track” appearance, the abnormal signal should not violate the ligament's margins.
Source: Radiology, October 2016; 281(1):23-40.
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"Visualizing MSK Radiology: A Practical Guide to Radiology Mastery" © 2022 MSK MRI Jee Eun Lee All Rights Reserved. #VisualizingMSK #KneeMRI #PCLinjury #PCLtear #ACLinjury #mucoid #tramtrack You should not distribute or commercially exploit the content. You should not transmit or store it on any other website or electronic retrieval system.
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