Patellar Clunk Syndrome after Patellofemoral Arthroplasty: A Case Report

Special Article - Surgical Case Reports

Austin J Surg. 2015;2(6): 1071.

Patellar Clunk Syndrome after Patellofemoral Arthroplasty: A Case Report

Jason Wong*, Sunjin Kim and Jonathan B Courtney

Montefiore Medical Center, USA

*Corresponding author: Jason Wong, Montefiore Medical Center, USA

Received: May 29, 2015; Accepted: August 17, 2015; Published: August 25, 2015


Patellar clunk syndrome is defined as a painful catching of the patella upon knee extension from a flexed position after total knee arthroplasty. It is usually caused by the formation of a discrete fibro synovial nodule at the junction between the superior pole of patella and the quadriceps tendon. We report a case of patellar clunk syndrome in a 51 year-old female after a patellofemoral joint replacement that improved after arthroscopic nodule excision and lateral retinacular release.

Case Report

A 51 year-old female presented to the osteoarthritis clinic with a chief complaint of anterior left knee pain. The pain was exacerbated with stairs, squatting, and getting up from a seated position. On exam, she had normal patella tracking, full knee range of motion, and positive patella grind. Radiographs of the left knee revealed large lateral osteophyte on the patella with joint space narrowing consistent with patella-femoral osteoarthritis (Figures 1A-1C).