Body Composition Measurements as Predictive Variables for Outcomes of Canine Appendicular Osteosarcoma Treated With...

Area of Science:

• Veterinary Oncology
• Medical Imaging
• Canine Cancer Research

Background:

• Body composition measurements (BCM) using computed tomography (CT) predict outcomes in human oncology.
• BCM applications in veterinary oncology, particularly for predicting outcomes in dogs with osteosarcoma (OSA), are unexplored.
• Pathologic fractures are a significant complication of OSA treatment, often leading to limb amputation or euthanasia.

Purpose of the Study:

• To investigate the relationship between BCM and the risk of pathologic fractures in dogs with naturally occurring OSA.
• To determine if BCM can predict survival time in dogs with OSA.

Main Methods:

• Whole-body CT scans were analyzed for 47 dogs with confirmed OSA before stereotactic body radiation therapy (SBRT).
• Evaluated BCM included abdominal volume, visceral adipose tissue volume, whole-body volume, and muscle/adipose tissue attenuations.
• Statistical analyses were performed to correlate BCM with fracture occurrence and survival time.

Main Results:

• No significant correlation was found between any BCM and survival time in dogs with OSA.
• A significantly positive association was identified between whole-body volume and the development of pathologic fractures.
• Abdominal volume correlated positively with whole-body volume, and visceral adipose tissue volume correlated positively with total body adipose tissue volume.

Conclusions:

• Whole-body volume, a BCM, is a potential predictor of pathologic fracture risk in dogs with OSA.
• Further research with larger sample sizes and prospective studies is needed to validate these findings.
• BCM may offer valuable insights for managing OSA treatment and predicting complications in canine patients.