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Osteoarthrosis of the antebrachiocarpal joint of 7 riding horses.

Magnusson LE, Ekman S - Acta Vet. Scand. (2001)

Bottom Line: The cause of severe OA in these mares is not clear.The fact that OA was bilateral indicates that a single traumatic injury is unlikely as an etiologic factor.It is discussed if the threshold of pain is higher in the antebrachiocarpal joint compared with the middle carpal joint.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Pathology, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala, Sweden.

ABSTRACT
Osteoarthrosis (OA) of the antebrachiocarpal joint from 7 riding horses is described. The horses were old mares and developed severe OA, with ankylosis in some of the joints. The lesions were bilateral, and the owners noticed the lameness in a late event. The cause of severe OA in these mares is not clear. The fact that OA was bilateral indicates that a single traumatic injury is unlikely as an etiologic factor. Considering the severe joint lesions it took long time before the horse-owners noticed the lameness. It is discussed if the threshold of pain is higher in the antebrachiocarpal joint compared with the middle carpal joint.

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a and b. Horse no 1. Specimens of a) distal radius and b) the proximal row of the carpal bones from the left carpal joint. Note large areas with loss of articular cartilage in the medial distal radius (arrows) and the proximal radial carpal bone (arrows) and a severe thickening of the joint capsule (*).
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Figure 1: a and b. Horse no 1. Specimens of a) distal radius and b) the proximal row of the carpal bones from the left carpal joint. Note large areas with loss of articular cartilage in the medial distal radius (arrows) and the proximal radial carpal bone (arrows) and a severe thickening of the joint capsule (*).

Mentions: The radial facet of the distal radius and the proximal part of the carpal radial bone presented large areas in the palmar parts with loss of articular cartilage and denuded eburnated bone surfaces (Figs. 1a and 1b). Areas of articular cartilage fraying were found adjacent to the denuded bone and in the middle carpal joint. The fraying was most severe in the palmar parts of the third, fourth and second carpal bones with "kissing lesions" in the corresponding articular surfaces of the distal parts of the ulnar, intermediate and radial carpal bones. Three mares (nos. 1, 2, 3) also had cartilage ulcerations in the palmar aspect of the third carpal bone with corresponding ulcerations in the third metacarpal bone, with small marginal osteophytes of these bones.


Osteoarthrosis of the antebrachiocarpal joint of 7 riding horses.

Magnusson LE, Ekman S - Acta Vet. Scand. (2001)

a and b. Horse no 1. Specimens of a) distal radius and b) the proximal row of the carpal bones from the left carpal joint. Note large areas with loss of articular cartilage in the medial distal radius (arrows) and the proximal radial carpal bone (arrows) and a severe thickening of the joint capsule (*).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2203221&req=5

Figure 1: a and b. Horse no 1. Specimens of a) distal radius and b) the proximal row of the carpal bones from the left carpal joint. Note large areas with loss of articular cartilage in the medial distal radius (arrows) and the proximal radial carpal bone (arrows) and a severe thickening of the joint capsule (*).
Mentions: The radial facet of the distal radius and the proximal part of the carpal radial bone presented large areas in the palmar parts with loss of articular cartilage and denuded eburnated bone surfaces (Figs. 1a and 1b). Areas of articular cartilage fraying were found adjacent to the denuded bone and in the middle carpal joint. The fraying was most severe in the palmar parts of the third, fourth and second carpal bones with "kissing lesions" in the corresponding articular surfaces of the distal parts of the ulnar, intermediate and radial carpal bones. Three mares (nos. 1, 2, 3) also had cartilage ulcerations in the palmar aspect of the third carpal bone with corresponding ulcerations in the third metacarpal bone, with small marginal osteophytes of these bones.

Bottom Line: The cause of severe OA in these mares is not clear.The fact that OA was bilateral indicates that a single traumatic injury is unlikely as an etiologic factor.It is discussed if the threshold of pain is higher in the antebrachiocarpal joint compared with the middle carpal joint.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Pathology, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala, Sweden.

ABSTRACT
Osteoarthrosis (OA) of the antebrachiocarpal joint from 7 riding horses is described. The horses were old mares and developed severe OA, with ankylosis in some of the joints. The lesions were bilateral, and the owners noticed the lameness in a late event. The cause of severe OA in these mares is not clear. The fact that OA was bilateral indicates that a single traumatic injury is unlikely as an etiologic factor. Considering the severe joint lesions it took long time before the horse-owners noticed the lameness. It is discussed if the threshold of pain is higher in the antebrachiocarpal joint compared with the middle carpal joint.

Show MeSH
Related in: MedlinePlus