What is mediopatellar plica?

Updated: Apr 20, 2020
  • Author: Tracy Lee Bigelow, DO; Chief Editor: Thomas M DeBerardino, MD  more...
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The mediopatellar plica (referred to by some as the Aoki ledge or Iino band) is the most frequently cited cause of plica syndrome. It lies on the medial wall of the joint, coursing from a suprapatellar origin obliquely down to insert on the infrapatellar (ie, Hoffa) fat pad. This plica, sometimes known as a shelf, lies in the coronal plane. [10, 11, 12]

The rare and poorly documented lateral synovial plica is a wider and thicker band than the medial plica. It is located along the lateral parapatellar synovium, inserting on the lateral patellar facet and extending distally toward the infrapatellar region. It has been argued that the lateral plica, rather than being a vestigial septum, is derived from the parapatellar adipose synovial fringe.

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