(Fig 4-C.11) Suprapatellar Plica Causing Compartmentalization

https://youtu.be/X930qYAikZ0

https://youtu.be/EiNzQqJbmYs

 

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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

1. Skeletal Radiology (2020) 49:823–836
2. European Journal of Radiology 62 (2007) 27–43
3. RadioGraphics 2018; 38:2069–2101
4. MRI Web Clinic – July 2020 Knee Bursae
5. Skeletal Radiol. 2018 Aug;47(8):1069-1086

 

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#SuprapatellarPlica, #KneePain, #OrthopedicRadiology, #KneeInjury, #JointCompartmentalization, #KneeBursae, #PlicaSyndrome, #Chondromalacia, #Arthroscopy, #RadiologyResearch