Computed tomographic signs of hyoid apparatus disease in 165 horses.
Authors: Hartl Bettina, Strohmayer Carina, Vali Yasamin, Lyrakis Manolis, Kneissl Sibylle M
Journal: Frontiers in veterinary science
Summary
# Hyoid Apparatus Disease in Horses: CT Findings and Clinical Significance Hyoid bone pathology in horses often manifests as non-specific clinical signs—exercise intolerance, behavioural resistance, anorexia, and headshaking—making diagnosis challenging without advanced imaging. Hartl and colleagues conducted a computed tomographic analysis of 165 horses to systematically characterise the radiological features of hyoid apparatus disease and establish its prevalence in their population, whilst examining correlations with concurrent cranial abnormalities. The study provides detailed CT sign descriptions of hyoid disease and quantifies its frequency, alongside associations with other head pathologies that may complicate clinical presentation. These findings are valuable for practitioners because they establish imaging benchmarks that aid earlier and more confident diagnosis of hyoid-related problems, particularly in horses with otherwise puzzling performance issues or behavioural complications. Understanding the prevalence and typical CT appearance of hyoid disease—and recognising it may coexist with other cranial conditions—should improve diagnostic accuracy and inform treatment planning for equine vets and clinicians managing horses with suspected temporohyoid joint disease or related osseous pathology.
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Practical Takeaways
- •CT imaging is a useful diagnostic tool for identifying hyoid bone disease in horses presenting with exercise intolerance, behavioral resistance, or headshaking; consider this diagnosis when other causes have been ruled out
- •Hyoid disease may present with multiple concurrent head pathologies on imaging, so comprehensive CT evaluation of the entire head region is warranted when investigating these cases
- •Recognition of hyoid apparatus disease opens treatment pathways for horses previously considered as behavioral or training problems
Key Findings
- •CT imaging identified specific radiographic signs associated with hyoid bone disease in 165 horses with various clinical presentations
- •Hyoid apparatus disease was associated with clinical symptoms including exercise intolerance, resistance to ridden work, anorexia, and headshaking
- •CT changes of the hyoid apparatus showed associations with other concurrent CT abnormalities of the head