Dynamic Ultrasound Assessment for Diagnosis of Pseudo-Patellar Clunk Syndrome: A Case Report

Patellar clunk syndrome (PCS) is a complication of total knee arthroplasty (TKA) leading to audible and palpable clunking of the patellofemoral joint as the knee is extended out of deep flexion. While historically a clinical diagnosis, some cases require further workup and imaging. Here, we demonstr...

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Published in:Journal of clinical ultrasound 2024-10
Main Authors: Carlson, Steven R, Klein, Gregg R, Cherian, Chris
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Klein, Gregg R
Cherian, Chris
description Patellar clunk syndrome (PCS) is a complication of total knee arthroplasty (TKA) leading to audible and palpable clunking of the patellofemoral joint as the knee is extended out of deep flexion. While historically a clinical diagnosis, some cases require further workup and imaging. Here, we demonstrated the utility of dynamic ultrasound assessment for a patient with clunking after TKA and identified a variant of PCS that is not well described in the literature. Therefore, this case provides considerations for the workup of post-TKA knee clunking while illustrating unique findings that may contribute to a more challenging diagnosis.
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title Dynamic Ultrasound Assessment for Diagnosis of Pseudo-Patellar Clunk Syndrome: A Case Report
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