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📌 Suprapatellar Plica
- The suprapatellar plica, a membrane remnant from embryonic development, is found in around 16% of adults.
✅ Symptoms
- Symptomatic suprapatellar plica is rare and results from inflammation due to injury.
- Patients report dull knee pain worsened by standing or squatting and tenderness at the top of the patella.
- Possible causes include repetitive mechanical stress on the patellar surface and impingement between the condyle and patella.
✅ Impingement Issues
- A low-lying, thickened plica can impinge on the upper trochlear cartilage, leading to secondary chondromalacia from compression during knee flexion.
✅ Bursa Compartmentalization
- Complete or partially open plica can compartmentalize the suprapatellar bursa, causing a palpable mass and pain from a trapped fluid.
- This may also trap loose bodies, exacerbating symptoms.
- A complete septum plica can obscure joint space visualization during arthroscopy, potentially hiding conditions like PVNS or intra-articular bodies.
References
- Skeletal Radiology (2020) 49:823–836
- European Journal of Radiology 62 (2007) 27–43
- RadioGraphics 2018; 38:2069–2101
- MRI Web Clinic – July 2020 Knee Bursae
- Skeletal Radiol. 2018 Aug;47(8):1069-1086
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#SuprapatellarPlica, #KneePain, #OrthopedicRadiology, #KneeInjury, #JointCompartmentalization, #KneeBursae, #PlicaSyndrome, #Chondromalacia, #Arthroscopy, #RadiologyResearch
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