Painful locking of the knee due to bucket handle tear of mediopatellar plica.
- Author:
Rui HE
1
;
Liu YANG
;
Lin GUO
Author Information
1. Center for Joint Surgery, South West Hospital, Third Military Medical University, Chongqing 400038, China.
- Publication Type:Case Reports
- MeSH:
Adult;
Arthroscopy;
Humans;
Knee Injuries;
physiopathology;
Male;
Pain;
etiology;
Patellofemoral Joint;
injuries
- From:
Chinese Journal of Traumatology
2011;14(2):117-119
- CountryChina
- Language:English
-
Abstract:
A case of swelling and anterior painful knee due to tear of mediopatellar plica is reported. The patient also felt clunk of the patellofemoral joint and knee locking. Under arthroscopic examination, a thick and fibrous plica was found medial to patellar, and a bucket tear along the plica from medial patellar retinaculum to infrapatellar fat pad. Polarized microscopic examination showed collagen fiber fragment and loss of light reflecting property. Neuro-immunohistology suggested up-regulation of synovial plica innervation in the area around the crack. This may be related to the pain. The bucket tear of mediopatellar plica-caused pain and lock of knee are more common than previously reported.
