- The medial patella plica is a developmental synovial membrane remnant.
- Can be seen in up to 30% of knees.
- It can be completely asymptomatic but can extend between the patella and trochlea and be compressed and cause pain. This is seen in so called Patella Plica Syndrome.
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- May also have chondromalacia in the adjacent patella and trochlea facet.
- A normal plica as shown is well defined and low signal.
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- It is found in the superomedial aspect of the joint and is best seen on axial scans.
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- With compression it will be thickened and ill defined and increase in signal.
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Ankylosing Spondylitis
KNEE
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