Unusual presentation of avulsion of the lateral head of the gastrocnemius muscle in a dog.

A five-and-a-half-year-old, male neutered golden retriever was presented with sudden onset, plantigrade stance of the left pelvic limb one month after a traumatic incident. A diagnosis of avulsion of the lateral head of the gastrocnemius muscle was made based on clinical signs and radiographic assessment. Initial wire reduction and fixation were unsuccessful. However, reduction and fixation with monofilament leader line augmented with a trans-hock external fixator resulted in a successful outcome. The dog had a normal gait 18 months after revision surgery.