Infrapatellar Plica
Description
Name
- Infrapatellar Plica
- Ligamentum Mucosum
General
- Embryologic remnant, one of the synovial plicae of the knee
- Most common of the knee plica, but not most commonly symptomatic
Kim Classification
- “Separate Type”: completely separated from the ACL (60.5%)
- “Split Type”: separate from the ACL, longitudinally divided (13.5%)
- “Vertical Septum Type”: attached to the ACL (10.5%)
- “Fenestra Type”: similar to the Vertical Septum Type with a fenestration (1%)
Epidemiology
MRI Features
- Best seen on T2 sagittal images
- Appears as a curvilinear low signal structure
- Origin: anterior intercondylar notch, traversing hoffas fat pad
- Attach to the inferior pole of the patella
- May connect the the ACL, anterior transverse meniscomeniscal ligament, or lateral meniscus
- Thickness ranges from very thin to as thick as ACL
Clinical Significance
See Also
References
- ↑ Singh, Dharmendra K., et al. "Infrapatellar plica injury: Magnetic resonance imaging review of a neglected cause of anterior knee pain." SA Journal of Radiology 25.1 (2021).
- ↑ Lee, Paul Yuh Feng, et al. "Synovial plica syndrome of the knee: a commonly overlooked cause of anterior knee pain." The Surgery Journal 3.01 (2017): e9-e16.
- ↑ Kim, Sung-Jae, Byoung-Hyoun Min, and Hyun-Kon Kim. "Arthroscopic anatomy of the infrapatellar plica." Arthroscopy: The Journal of Arthroscopic & Related Surgery 12.5 (1996): 561-564.
- ↑ Kosarek, FrankJ, and Clyde A. Helms. "The MR appearance of the infrapatellar plica." AJR. American journal of roentgenology 172.2 (1999): 481-484.