Radiographic Description of a Bone Exostosis Lesion on the Caudal Aspect of the Proximal Tibia in Three Thoroughbred Yearlings (2014–2019)

Barton, Charlie; Sandow, Cole B.; Rodgerson, Dwayne H.

doi:10.1016/j.jevs.2020.103238

Cited by 1 publication

(3 citation statements)

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“…Exostosis has generally been associated with varied clinical lameness, ranging from no to moderate ( Honnas, 1992 ; Bramlage, 2009 ; Vanderperren and Saunders, 2009 ; Shaw and Rosanowski, 2019 ; Barton et al , 2020 ; De Souza et al , 2021 ). In this study, most of the Sarj horses diagnosed with P1 exostosis showed mild or even no lameness.…”

Section: Discussionmentioning

confidence: 99%

“…Exostosis is considered uncommon in horses ( Butler et al , 2017 ). In long bones of horses, the lesion is reported in radius ( Nixon et al , 2004 ), third metacarpal/metatarsal bone ( Bertoni et al , 2012 ), second and fourth metacarpal/metatarsal bones ( Honnas, 1992 ; Zubrod et al , 2004 ), proximal forelimb phalanx ( Seghrouchni et al , 2019a ; Shaw and Rosanowski, 2019 ), forelimb middle phalanx ( Easter et al , 1998 ), and tibia ( Collins, 1998 ; Barton et al , 2020 ). The new bone formation has been attributed to a number of causative agents and associated factors.…”

Section: Introductionmentioning

confidence: 99%

“…Bone exostosis usually does not cause clinical lameness and could not be discovered unless specific diagnostic tools are used for some reason. For example, Barton et al (2020) identified bone exostosis incidentally at the caudo-proximal aspect of the tibia during a routine pre-purchase radiographic examination of yearling horses (not at racing age) that showed no lameness. However, if the new overgrowth bone disrupted the surrounding soft tissue structures such as tendons and ligaments ( Honnas, 1992 ; De Souza et al , 2021 ), then a variable degree of lameness would be seen and ranged from mild to moderate ( Honnas, 1992 ; Bramlage, 2009 ; De Souza et al , 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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First Phalanx Exostosis in Traditional Equestrian Horses in Western Libya

Abushhiwa¹,

Elmeshreghi²,

Alrtib³

et al. 2022

Open Vet J

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Background: Orthopedic diseases involving the forelimb fetlock joint of horses other than those used in professional racing have not been widely reported in the literature. One of these problems is the exostosis on the proximal forelimb phalanx (P1), which has not been reported previously in Western Libya. Aim: The study aimed to investigate the prevalence of P1 exostosis in traditional equestrian horses (known locally as Sarj horses) of different breeds in Libya that participated in a special social event and described its clinical findings radiographic appearance. Methods: The current study involved 60 horses admitted to private veterinary clinics with varied fetlock orthopedic problems. The studied horses were aged between 6 and 11 years old and galloped on hard grounds. Clinical and radiographic examinations were carried out on all horses. Lateromedial radiographs for one or both forelimb fetlock joints were acquired for each horse. Results: Clinical examination revealed that 21 horses (35%) had hard non-painful swelling on the dorsal aspect of fetlock with joint stiffness during flexion. In 19 of them, the swelling was bilateral. No forelimb lameness was noticed. Radiographically, hard swelling was diagnosed as bone exostosis, with various sizes, on the proximo-dorsal aspect of P1. There was also a new bone formation on the disto-dorsal part of third metacarpal bone in two cases. Conclusion: This study has documented the first report on bone exostosis on the proximo-dorsal aspect of the forelimb proximal phalanx as a common problem in Sarj horses that galloped on hard grounds in Western Libya. Although this bone lesion did not cause lameness in all reported cases, further investigations are warranted to identify its histopathological nature, potential etiology, and proper treatment.

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