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Case Reports in Orthopedics
Volume 2016, Article ID 8208271, 3 pages
Case Report

An Unusual Prepatellar Bursa Swelling: Patellar Button Dissociation and Migration

1Guys and St Thomas’ NHS trust, Department of Orthopaedics, Westminster Bridge Road, London SE1 7EH, UK
2Darent Valley Hospital, Darenth Wood Road, Dartford, Kent DA2 8DA, UK

Received 1 August 2015; Accepted 29 December 2015

Academic Editor: Paul E. Di Cesare

Copyright © 2016 Thomas Hester and Farid Moftah. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Implant loosening is not a new phenomenon, nor is implant migration; however they are rarely seen after knee arthroplasty surgery. Complications with patellar buttons have been reported before with peg failure, loosening, and patella fracture; however extra-articular migration is extremely rare. We report an unusual case of patellar button migration 11 years after total knee arthroplasty to the prepatellar bursa.