Internal derangement of the knee joint due to pathologic synovial folds: the mediopatellar plica syndrome.

摘要: A prospective study of the mediopatellar plica was performed by arthroscopy in 134 patients. The is a fold synovial tissue attaching medially at undersurface quadriceps tendon which extends distally around patella and over medial femoral condyle to insert into fat pad. Extensor mechanism derangement may be produced when it loses its pliability owing fibrosis or hyalinization. Persistent disabling symptoms require surgical treatment consisting excision arthrotomy operative arthroscopy.