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CC BY-NC-ND 4.0 · Joints 2019; 07(04): 209-214
DOI: 10.1055/s-0041-1730980
Case Report

Irreducible Posterolateral Fracture Dislocation of the Knee in an Elderly Patient Treated with Rotating Hinge Total Knee Replacement

Gabriele Bernardi 
1   Department of Orthopedic Surgery, University of Rome Tor Vergata, Rome, Italy
,
Maria Teresa Manisera
1   Department of Orthopedic Surgery, University of Rome Tor Vergata, Rome, Italy
,
Alexander Vallone
1   Department of Orthopedic Surgery, University of Rome Tor Vergata, Rome, Italy
,
Cosimo Tudisco 
1   Department of Orthopedic Surgery, University of Rome Tor Vergata, Rome, Italy
› Author Affiliations Funding None.
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Abstract

Knee dislocation is one of the few real orthopaedic emergencies. It is a serious but relative uncommon injury, representing less than 0.02% of all orthopaedic injuries. Especially posterolateral knee dislocation is much rarer condition that is often missed or misdiagnosed. The main feature of this very rare condition is to be irreducible by closed reduction due to the interposition of soft tissues inside the enlarged medial joint space, such as the medial capsule and retinaculum, vastusmedialis, and medial meniscus. The pathognomonic sign of a posterolateral knee dislocation is the anteromedial distal thigh transverse “pucker” or “dimple sign.” We report the case of an 87-year-old man who sustained an irreducible posterolateral fracture dislocation of the knee after being hit by car which has been treated with rotating hinge knee replacement with 1-year of follow-up.

Keywords

knee dislocation - posterolateral knee dislocation - irreducible fracture dislocation - rotating hinge knee replacement

Ethical Approval

The patient gave written informed consent prior being included in the case report.




Publication History

Received: 08 April 2018

Accepted: 18 April 2021

Article published online:
18 June 2021

© 2021. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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