Histopathology and computed tomography of age-associated degeneration of the equine temporohyoid joint

Equine Veterinary Journal
R J NaylorR J Piercy

Abstract

The aetiology of temporohyoid osteoarthropathy (THO) is unknown; both primary infectious and degenerative causes have been suggested. There is a significant association between increasing age and severity of temporohyoid joint degeneration. To examine the histopathology of the temporohyoid articulation in aged horses and to compare the appearance of the joint with computed tomography (CT) and peripheral quantitative CT (pQCT). pQCT scans of the temporohyoid articulations were obtained bilaterally from 31 horses (range age 1-44 years) post mortem and images were graded by 2 blinded observers on 2 occasions for the presence of osteophytes, irregularity of the joint surface and mineralisation. Eight heads had been examined previously by CT, with the images similarly graded for the shape and density of the proximal stylohyoid bones, bone proliferation surrounding the joint, mineralisation of the tympanohyoid cartilage and the relationship of the petrous temporal bone to the stylohyoid bone. Sixteen temporohyoid joints were then evaluated histologically. There was significant association between the mean pQCT degeneration score and age (rho = 0.75; P<0.0001), between the pQCT and CT score (rho = 0.63; P = 0.01) and between the degen...Continue Reading

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Citations

Apr 1, 2014·The Veterinary Clinics of North America. Equine Practice·Erin G Porter, Natasha M Werpy
Feb 24, 2016·Veterinary and Comparative Orthopaedics and Traumatology : V.C.O.T·Adel M BadawyEman A Eshra
Nov 28, 2012·The Veterinary Clinics of North America. Equine Practice·Sarah M Puchalski
Oct 31, 2012·Equine Veterinary Journal·R Weller
Apr 26, 2013·Australian Veterinary Journal·P K ReadfordC J Secombe
Mar 15, 2015·The Veterinary Clinics of North America. Equine Practice·David E Freeman
Jul 28, 2016·The Veterinary Clinics of North America. Equine Practice·Victoria M Nicholls, Neil Townsend
Dec 1, 2018·Equine Veterinary Journal·Anthony Pease, Celia M Marr
Jun 2, 2021·Journal of the American Veterinary Medical Association·Erin N HalesCarrie J Finno
May 31, 2021·Equine Veterinary Journal·Holly L StewartChristopher E Kawcak

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