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Bonnaig NS, Casstevens EC, Freiberg R. Posterior knee dislocation following septic arthritis of the knee. Geriatr Orthop Surg Rehabil. 2012;3(1):45-7doi: 10.1177/2151458511430664.
Bonnaig, N. S., Casstevens, E. C., & Freiberg, R. (2012). Posterior knee dislocation following septic arthritis of the knee. Geriatric orthopaedic surgery & rehabilitation, 3(1), 45-7. https://doi.org/10.1177/2151458511430664
Bonnaig, Nicolas S, et al. "Posterior knee dislocation following septic arthritis of the knee." Geriatric orthopaedic surgery & rehabilitation vol. 3,1 (2012): 45-7. doi: https://doi.org/10.1177/2151458511430664
Bonnaig NS, Casstevens EC, Freiberg R. Posterior knee dislocation following septic arthritis of the knee. Geriatr Orthop Surg Rehabil. 2012 Mar;3(1):45-7. doi: 10.1177/2151458511430664. PMID: 23569696; PMCID: PMC3617901.
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Geriatr Orthop Surg Rehabil. 2012 Mar;3(1):45-7. doi: 10.1177/2151458511430664.

Posterior knee dislocation following septic arthritis of the knee.

Geriatric orthopaedic surgery & rehabilitation

Nicolas S Bonnaig, E Christopher Casstevens, Richard Freiberg

Affiliations

  1. Department of Orthopaedic Surgery, University of Cincinnati, Cincinnati, OH, USA.

PMID: 23569696 PMCID: PMC3617901 DOI: 10.1177/2151458511430664

Abstract

This is a report of a case of nontraumatic posterior knee dislocation following septic arthritis in a 59-year-old male with leucopenia secondary to sarcoidosis. After confirmation of the diagnosis with synovial fluid analysis, the patient was taken emergently to the operating room for arthroscopic-assisted irrigation and debridement. Arthroscopy demonstrated intact cruciate ligaments but confirmed the diagnosis of septic arthritis demonstrating purulent synovial fluid. He was discharged after multiple repeat irrigation and debridement procedures and intravenous antibiotics improved his symptoms. The infection appeared to resolve as his laboratory values normalized following treatment. Three months later, however, x-rays revealed a nontraumatic posterior knee dislocation. We hypothesize that the soft tissues including the cruciate and collateral ligaments were made incompetent by enzymatic digestion and stretching with mobilization which allowed the knee to dislocate without a traumatic event.

Keywords: posterior knee dislocation; sarcoidosis; septic arthritis of the knee

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