title: The Rule of Histology in the Diagnosis of Periprosthetic Infection: Specific Granulocyte Counting Methods and New Immunohistologic Staining Techniques may Increase the Diagnostic Value.
abstract: OBJECTIVE
  The current study investigates the diagnostic accuracy of the criteria described for frozen sections and whether modern leukocyte specific staining techniques including leukocyte peroxidase and Naphtol-AS-D-chloroacetate-esterase will improve the accuracy of the intra-operative histology.
  
  
  METHODS
  77 patients undergoing revision total hip and knee arthroplasty were included in this retrospective study. Patients were grouped into septic and aseptic based on intraoperative cultures. Tissue samples were analyzed utilizing the Mirra, Feldman, Lonner, Banit and Athanasou criteria.
  
  
  RESULTS
  An experienced pathologist had a high specificity (96%), but rather low sensitivity (57%) diagnosing infection. By using the Banit-, Mirra-, or Athanasou-criteria the sensitivity is increased to 0.90. The Feldman- and Lonner-criteria have a lower sensitivity (0.48 and 0.38), however, an increased specificity of 0.96 and 0.98, respectively. The Banit cut off has the highest accuracy (86%). MPOX and NACE staining increased the sensitivity and accuracy up to 100% and 92% respectively.
  
  
  CONCLUSIONS
  Banit's cut off is the most accurate histologic criteria to diagnose infection. Modern leukocyte specific staining techniques slightly improve the accuracy. The synovial fluid white blood cell count appears to be the most accurate intraoperative test.
authors.affiliation: Adult Reconstruction & Joint Replacement Division, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY, USA.
authors.forename: Friedrich
authors.initials: F
authors.lastname: Boettner
authors.affiliation: Gerhard-Domagk Institute of Pathology, University of Muenster, Muenster, Germany.
authors.forename: Gabriele
authors.initials: G
authors.lastname: Koehler
authors.affiliation: Department of Orthopedics and Tumor Orthopedics, University of Muenster, Muenster, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Wegner
authors.affiliation: Adult Reconstruction & Joint Replacement Division, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY, USA.
authors.forename: Tom
authors.initials: T
authors.lastname: Schmidt-Braekling
authors.affiliation: Department of Orthopedics and Tumor Orthopedics, University of Muenster, Muenster, Germany.
authors.forename: Georg
authors.initials: G
authors.lastname: Gosheger
authors.affiliation: Department of Orthopedics, Auguste Viktoria Hospital, Bad Oeynhausen, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Goetze
keywords: Deep Implant Infection; Diagnostic; Frozen Section; Histology