Study finds bilateral muscle changes in dogs with unilateral CCLD

Dogs with unilateral cranial cruciate ligament disease may be showing broader hindlimb muscle dysfunction than a routine orthopedic exam suggests. In a new study published in The Veterinary Journal, investigators used acoustic myography, a non-invasive method that records muscle activity, to assess 21 dogs with unilateral CCLD and found altered muscle function in both the affected and contralateral hindlimbs, not just the lame side. The finding adds to a growing body of evidence that “unilateral” cruciate disease can have bilateral functional consequences, even when only one stifle is clinically diagnosed. (pmc.ncbi.nlm.nih.gov)

Why it matters: For veterinary professionals, the study reinforces the idea that CCLD should be approached as more than a single-joint problem. Prior literature has already shown that cranial cruciate ligament rupture is one of the most common orthopedic conditions in dogs, and that bilateral rupture or later contralateral involvement is a recognized risk. If muscle adaptations are occurring in both hindlimbs, clinicians may need to think more broadly about baseline assessment, rehab planning, gait monitoring, and pet parent counseling, including the possibility that the “unaffected” limb may not be functionally normal. (pubmed.ncbi.nlm.nih.gov)

What to watch: Watch for follow-up work on whether acoustic myography can help guide rehabilitation, track recovery after surgery, or identify dogs at risk for contralateral decline earlier in the course of disease. (researchprofiles.ku.dk)