Findings consistent with equine proximal suspensory desmitis can be reliably detected using computed tomography and differ between affected horses and controls.

Abstract: The objective of this retrospective, observational, controlled study was to evaluate bone and soft tissue window CT images of the proximoplantar metatarsus III region in twenty horses with pain localized to the proximal suspensory ligament (PSL) and 20 horses with findings nonrelated to tarsal pain. All horses underwent CT and radiographic examination. Images were reviewed by three independent observers who graded the severity and localization of findings. Bone-related categories as well as soft tissue-related categories were evaluated. For the comparison of imaging findings in horses with and without proximal suspensory desmitis (PSD), mixed linear regression was performed. The intraclass correlation coefficient (ICC) was calculated to assess intraobserver agreement, and kappa statistics were employed to evaluate interobserver agreement. CT examination identified significantly more abnormalities in the diseased group. The scores for osseous exostosis (p = .015) and PSL enlargement (p = .004) were notably higher in PSD horses compared to controls. Intraobserver agreement was overall high (ICC .82-1.0), and interobserver agreement was substantial for the detection of mineralization (kappa = .61) and moderate for sclerosis (kappa = .43), exostosis (kappa = .43), and PSL enlargement (kappa = .48/.51). Measurements in the soft tissue window were significantly smaller than those in the bone window. Findings concurrent with PSD including osseous proliferation and sclerosis as well as soft tissue enlargement, mineralization, and avulsion can be reliably detected using CT. Findings from the current study supported the use of CT for evaluating horses with suspected PSD where high-field MRI is not available.
Publication Date: 2023-08-21 PubMed ID: 37605336DOI: 10.1111/vru.13292Google Scholar: Lookup
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  • Journal Article

Summary

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This research investigates the use of computed tomography (CT) in diagnosing equine proximal suspensory desmitis, a common condition affecting horses. The study found that CT scanning can reveal significant differences in the affected tissues between healthy horses and those with the condition.

Objectives of the Study

  • The study aimed to evaluate the effectiveness of computed tomography in diagnosing equine proximal suspensory desmitis (PSD), a condition characterized by inflammation and degeneration of the proximal suspensory ligament in horses.
  • Using CT imaging, the researchers focused on identifying abnormalities in the proximoplantar metatarsus III region, an area often affected by PSD.

Methodology

  • This was a controlled, observational and retrospective study, involving two groups of 20 horses each – a group exhibiting symptoms of PSD and a control group showing no such symptoms.
  • All horses underwent CT and radiographic examinations, and the resulting images were evaluated by three independent observers.
  • The researchers also employed statistical methods such as mixed linear regression and intraclass correlation coefficient to compare and analyze the imaging findings in horses with and without PSD.

Findings

  • The CT examination revealed a significantly higher number of detectable abnormalities in horses diagnosed with PSD, including bone abnormalities (osseous exostosis) and suspensory ligament enlargement.
  • The researchers found a high degree of agreement among observers (intraobserver agreement) in identifying these abnormalities.
  • The use of CT was also deemed reliable for detecting signs of PSD and the severity of the condition, paving the way for its use when high-field MRI, a more advanced diagnostic tool, is unavailable.

Implications of the Research

  • This research validates the use of CT imaging as a reliable tool for diagnosing equine proximal suspensory desmitis and studying severity and disease progression.
  • As a diagnostic tool, CT can reveal tissue abnormalities related to PSD, including bone and ligament changes that could prove crucial for devising treatment plans.
  • These findings can potentially help veterinarians make more informed decisions when treating horses affected with PSD, particularly in situations where advanced imaging techniques like high-field MRI are unavailable.

Cite This Article

APA
Mu00fcller EMT, Vanderperren K, Merle R, Rheinfeld S, Leelamankong P, Lischer CJ, Ehrle A. (2023). Findings consistent with equine proximal suspensory desmitis can be reliably detected using computed tomography and differ between affected horses and controls. Vet Radiol Ultrasound. https://doi.org/10.1111/vru.13292

Publication

ISSN: 1740-8261
NlmUniqueID: 9209635
Country: England
Language: English

Researcher Affiliations

Mu00fcller, Eva M T
  • Equine Clinic, School of Veterinary Medicine, Freie Universitu00e4t Berlin, Berlin, Germany.
Vanderperren, Katrien
  • Department of Medical Imaging of Domestic Animals and Orthopedics of Small Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
Merle, Roswitha
  • Institute for Veterinary Epidemiology and Biostatistics, School of Veterinary Medicine, Freie Universitu00e4t Berlin, Berlin, Germany.
Rheinfeld, Svenja
  • Equine Clinic, School of Veterinary Medicine, Freie Universitu00e4t Berlin, Berlin, Germany.
Leelamankong, Pitiporn
  • Equine Clinic, School of Veterinary Medicine, Freie Universitu00e4t Berlin, Berlin, Germany.
Lischer, Christoph J
  • Equine Clinic, School of Veterinary Medicine, Freie Universitu00e4t Berlin, Berlin, Germany.
Ehrle, Anna
  • Equine Clinic, School of Veterinary Medicine, Freie Universitu00e4t Berlin, Berlin, Germany.

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