BMJ Case Reports 2018; doi:10.1136/bcr-2018-226603
  • Unusual association of diseases/symptoms

Patella incarceration with associated patella fracture: a rare case of a paediatric patient with no associated femoral fracture

  1. Paul Whittingham-Jones
  1. Trauma and Orthopaedic Department, West Hertfordshire Hospitals NHS Trust, Watford, UK
  1. Correspondence to Miss. Hannah Louise Morley, hannah.morley1{at}
  • Accepted 26 August 2018
  • Published 14 September 2018


We describe the case of a 15-year-old girl who presented to the Accident and Emergency Department with right knee pain and a tense effusion following a twist and fall directly onto her right knee. An MRI scan demonstrated that she had an incarcerated dislocated patella with an associated patella avulsion fracture. This required open reduction. Open reduction and fixation was performed using suture anchors. We feel that this case is particularly pertinent since nearly all previous case reports describe an incarcerated patella with an associated femur fracture. Furthermore, no previous case reports have been published in a child.


  • Contributors Case report primarily written by HLM. Editing by AS. Case proposed by PWJ and further editing by PWJ.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

Register for free content

The full text of all Editor's Choice articles and summaries of every article are free without registration

The full text of Images in ... articles are free to registered users

Only fellows can access the full text of case reports (apart from Editor's Choice) - become a fellow today, or encourage your institution to, so that together we can grow and develop this resource

Don't forget to sign up for content alerts so you keep up to date with all the case reports as they are published, and let us know what you think by commenting on the Editor's blog

Navigate This Article