Results of bone scintigraphy in racing standardbred ...
|Title||Results of bone scintigraphy in racing standardbred horses: 64 cases (1992-1994)|
|Author(s)||P. J. Ehrlich, Ian R. Dohoo, M. W. O'Callaghan|
|Journal||Journal of the American Veterinary Medical Association|
|Abstract||OBJECTIVE: To document anatomic patterns of scintigraphic uptake and related orthopedic disease associated with racing activity in Standardbred horses. DESIGN: Retrospective study. ANIMALS: 64 Standardbred horses evaluated for lameness. PROCEDURE: Medical records at the time of discharge were reviewed, and information regarding signalment; history; results of lameness examination, scintigraphy, and radiography; diagnosis; and treatment were obtained. RESULTS: 274 areas of increased radiopharmaceutical uptake were identified. Scintigrams of 218 limbs (106 forelimbs, 112 hind limbs) were available for review. Seventy-three (33%) scintigrams had increased radiopharmaceutical uptake associated with the proximal sesamoids, 46 of 106 (43%) fore-limb scintigrams had increased uptake associated with the third carpal bone, and 33 of 112 (33%) hind limb scintigrams had radiopharmaceutical uptake associated with the small tarsal bones. Forty-three of 218 (20%) scintigrams had increased uptake associated with the distal aspect of the third metacarpal and metatarsal bones. Abnormal scintigraphic uptake was bilateral in 91 of 139 (65%) forelimb locations and 99 of 134 (74%) hind limb locations with increased radiopharmaceutical uptake. The primary scintigraphically identified classifications of disease were exercise-induced bone remodeling, synovitis or arthritis, and soft-tissue avulsion from bone (66, 17, and 6% of areas with increased radiopharmaceutical uptake, respectively). Of 274 areas with increased radiopharmaceutical uptake, 244 (89%) were believed to be clinically important. CONCLUSIONS AND CLINICAL RELEVANCE: Distinctive patterns of increased radiopharmaceutical uptake were identified that suggested Standardbred horses used for racing may have a predilection to develop orthopedic disease at specific sites that are distinct from those in Thoroughbreds used for racing and horses used for jumping activities.|
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