[Role of synovial plicae in pathology of the knee]

Medial synovial plicae are a cause of internal derangement of the knee in less than 3 p. 100 of cases. The diagnosis of a symptomatic plica is made on clinical and arthroscopic findings. Superior plicae are generally not pathological. When associated with another cause of internal derangement, a medial plica is generally not pathological.