Pseudoarthrogram sign - a rare radiological appearance of implant failure in the knee.

Abstract

We present the radiological findings in the case of a failed unicompartmental knee arthroplasty (UKA). Although uncommon, these features are highly specific for implant failure and are an indication to consider revision. The aim of this case report is to highlight these characteristic appearances across multiple imaging modalities to both surgeons and radiologists should they encounter this in their practise.