Clinical Challenge:
3-year-old racing Greyhound with a previously diagnosed stress fracture of the right hock (tarsus), identified on radiographs following an acute onset lameness during training. The fracture was managed conservatively with rest and rehabilitation, and follow-up imaging indicated appropriate healing. The dog was cleared to return to racing.
Why Conventional Imaging Was Inconclusive:
Standard X-rays confirmed healing of the original stress fracture and showed no clear evidence of catastrophic injury. Subtle bone stress reactions or ongoing metabolic bone activity are often not visible on routine radiographs once structural healing appears complete. As a result, there was uncertainty as to whether the lameness was behavioural, soft tissue–related, or due to unresolved bone pain.
What SPECT-CT Revealed:
Functional imaging demonstrated persistent focal increased uptake within the right hock, consistent with ongoing bone stress and active remodelling at the previous fracture site. Additional low-grade uptake was also noted in adjacent tarsal structures, indicating that the joint had not fully returned to a normal metabolic state despite radiographic healing. This confirmed that the dog was still experiencing active pathology and likely discomfort during high-intensity performance.
Outcome & Treatment Planning:
The dog was formally retired from racing, transitioned into a pet home, and managed with supportive joint care and controlled exercise. In the lower-demand environment, the Greyhound has remained comfortable and has successfully adapted to life as a companion animal, demonstrating the value of advanced imaging in supporting evidence-based and welfare-focused decision-making.This confirmed that the dog was still experiencing active pathology and likely discomfort during high-intensity performance.