Читать книгу Fractures in the Horse - Группа авторов - Страница 123

The stress continuum in the dorsal metacarpus and metatarsus in racing and non‐racing horses has been studied [58, 109], and a grading scheme of one to four [109] suggested. Scintigraphy exhibited excellent sensitivity, but false positives with clinically normal limbs having IRU [109]. Interpretation is further complicated by cross over between dorsal metacarpal disease and cortical stress fractures as one process maybe superimposed on the other [110]. Nuclear scintigraphy has been utilized in Thoroughbreds to differentiate between dorsal metacarpal disease, defined as uniform diffuse IRU in the dorsal cortex relative to the palmar cortex and metaphyses, and cortical stress fractures, defined as focal intense IRU in the dorsal cortex [58]. In this location, the focal nature of the IRU has been considered more significant than intensity [61].