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Animals : an open access journal from MDPI2021; 11(12); 3366; doi: 10.3390/ani11123366

Imaging and Gross Pathological Appearance of Changes in the Parasagittal Grooves of Thoroughbred Racehorses.

Abstract: (1) Background: Parasagittal groove (PSG) changes are often present on advanced imaging of racing Thoroughbred fetlocks and have been suggested to indicate increased fracture risk. Currently, there is limited evidence differentiating the imaging appearance of prodromal changes in horses at risk of fracture from horses with normal adaptive modelling in response to galloping. This study aims to investigate imaging and gross PSG findings in racing Thoroughbreds and the comparative utility of different imaging modalities to detect PSG changes. (2) Methods: Cadaver limbs were collected from twenty deceased racing/training Thoroughbreds. All fetlocks of each horse were examined with radiography, low-field magnetic resonance imaging (MRI), computed tomography (CT), contrast arthrography and gross pathology. (3) Results: Horses with fetlock fracture were more likely to have lateromedial PSG sclerosis asymmetry and/or lateral PSG lysis. PSG lysis was not readily detected using MRI. PSG subchondral bone defects were difficult to differentiate from cartilage defects on MRI and were not associated with fractures. The clinical relevance of PSG STIR hyperintensity remains unclear. Overall, radiography was poor for detecting PSG changes. (4) Conclusions: Some PSG changes in Thoroughbred racehorses are common; however, certain findings are more prevalent in horses with fractures, possibly indicating microdamage accumulation. Bilateral advanced imaging is recommended in racehorses with suspected fetlock pathology.
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Publication Date: 2021-11-24 PubMed ID: 34944142PubMed Central: PMC8697963DOI: 10.3390/ani11123366Google Scholar: Lookup
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Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research investigates the changes in the Parasagittal Grooves (PSG) of racehorses through various imaging techniques. It seeks to differentiate between normal adaption responses to galloping, and precursors to fracture risks in the Thoroughbred racehorses.

Background

  • PSG changes are often discernible in imaging of racing thoroughbred fetlocks and believed to correspond with fracture risk.
  • Understanding and differentiating the appearance of potential fracture risks in horses from normal changes brought about by galloping is a largely unexplored area of study.
  • This study aims to discover the changes in the parasagittal grooves (PSG) of thoroughbred racehorses and to evaluate the effectiveness of different imaging techniques in detecting these changes.

Methods

  • Researchers collected cadaver limbs from twenty deceased Thoroughbreds involved in racing and training.
  • Their fetlocks were examined using multiple imaging techniques including radiography, low-field magnetic resonance imaging (MRI), computed tomography (CT), contrast arthrography and gross pathology.

Results

  • Thoroughbreds with fetlock fractures were more likely to exhibit PSG sclerosis asymmetry and/or lateral PSG lysis.
  • MRI was not effective in detecting such PSG lysis. Likewise, differentiating PSG subchondral bone defects from cartilage defects was challenging on MRI and these were not linked to fractures.
  • The implications of PSG STIR hyperintensity in a clinical context remains ambiguous.
  • Radiography largely proved ineffective for detecting PSG changes.

Conclusion

  • Although PSG changes are common in thoroughbred racehorses, certain changes are more frequent in horses with fractures, suggesting the potential accumulation of microdamage.
  • The study recommends utilizing bilateral advanced imaging in racehorses with suspected fetlock pathology to accurately diagnose potential risks.

Cite This Article

APA
Johnston GCA, Ahern BJ, Palmieri C, Young AC. (2021). Imaging and Gross Pathological Appearance of Changes in the Parasagittal Grooves of Thoroughbred Racehorses. Animals (Basel), 11(12), 3366. https://doi.org/10.3390/ani11123366

Publication

Animals : an open access journal from MDPI
ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 11
Issue: 12
PII: 3366

Researcher Affiliations

Johnston, Georgina C A
  • School of Veterinary Science, The University of Queensland, Gatton 4343, Australia.
Ahern, Benjamin J
  • School of Veterinary Science, The University of Queensland, Gatton 4343, Australia.
Palmieri, Chiara
  • School of Veterinary Science, The University of Queensland, Gatton 4343, Australia.
Young, Alex C
  • School of Veterinary Science, The University of Queensland, Gatton 4343, Australia.

Grant Funding

  • PRJ-012062 / Agrifutures Australia

Conflict of Interest Statement

The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.

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Citations

This article has been cited 1 times.
  1. Basran PS, McDonough S, Palmer S, Reesink HL. Radiomics Modeling of Catastrophic Proximal Sesamoid Bone Fractures in Thoroughbred Racehorses Using μCT.. Animals (Basel) 2022 Nov 4;12(21).
    doi: 10.3390/ani12213033pubmed: 36359157google scholar: lookup
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