JBJI Journal of Bone and Joint Infection JBJI J. Bone Joint Infect. 2206-3552 Ivyspring Göttingen, Germany 10.7150/jbji.29289 Accuracy of Synovial Leukocyte and Polymorphonuclear Cell Count in Patients with Shoulder Prosthetic Joint Infection Strahm Carol 1 Zdravkovic Vilijam 2 Egidy Claus 2 Jost Bernhard 2 Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital St. Gallen, St. Gallen, Switzerland Department of Orthopaedics and Traumatology, Cantonal Hospital St. Gallen, St. Gallen, Switzerland 11 11 2018 3 5 245 248 Copyright: © 2018 Carol Strahm et al. 2018 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://jbji.copernicus.org/articles/3/245/2018/jbji-3-245-2018.html The full text article is available as a PDF file from https://jbji.copernicus.org/articles/3/245/2018/jbji-3-245-2018.pdf

<p class="p p-first-last" id="__p2">Joint aspiration in suspected infected implants is a validated diagnostic method in establishing the diagnosis of prosthetic joint infection (PJI). Cut-off values for synovial leukocyte counts and differentials are well described for patients with hip and knee PJI. In 19 failed shoulder implants, a leucocyte count of &gt;12.2 G/L had a sensitivity and specificity of 92% and 100% respectively; A differential of &gt;54% neutrophils had a sensitivity of 100 % and a specificity of 75%.</p>

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