Synovial plicae (knee)
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Synovial plicae are folds of synovium, thought to represent embryologic remnants. They are common, present in ~90% of arthroscopies 3.
They have been implicated in anterior knee pain and possibly in chondromalacia patellae although their role remains controversial 1,3.
Gross anatomy
Some plicae have been described with multiple names in the literature representing the same structure 1,2:
- medial patellar plica: most common symptomatic plica
- suprapatellar plica / superior patellar plica
- infrapatellar plica / ligamentum mucosum: most common knee plica
- lateral patellar plica: rare (<1%)
They range in shape from a ridge or shelf to more discrete cord-like structure 3.
Radiographic features
CT arthrography
MaybeMay be seen as a shelf like band.
MRI
- PD/T2: typically seen as a band-like low signal structure traversing through the joint space (arthrography study or when joint effusion is present)
Related pathology
-</ul><p>They range in shape from a ridge or shelf to more discrete cord-like structure <sup>3</sup>. </p><h4>Radiographic features</h4><h5>CT arthrography</h5><p>Maybe seen as a shelf like band</p><h5>MRI</h5><ul><li>- +</ul><p>They range in shape from a ridge or shelf to more discrete cord-like structure <sup>3</sup>. </p><h4>Radiographic features</h4><h5>CT arthrography</h5><p>May be seen as a shelf like band.</p><h5>MRI</h5><ul><li>
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