Hock Fracture in a 2-month-old Heifer
A valuable 2 month old Holstein heifer presented to the Cornell University Equine and Farm Animal Hospital on January 6th, 2014 for an evaluation of non-weight bearing lameness and swelling in her left tarsus of about five days duration. There was no known history of trauma and the heifer had been treated by the farm manager with flunixin meglumine and penicillin with little improvement. On presentation she was non-weight bearing on the left hind limb and her tarsus was significantly swollen. The rest of her physical exam was unremarkable. Radiographs of her left tarsus were taken and revealed a comminuted fracture of the calcaneus into three main segments, a questionable fracture of the talus, and marked soft tissue swelling. Based on the complexity of the fracture and the value of the heifer, she was placed under general anesthesia and a Computed Tomography (CT) scan was performed to better characterize the fracture. The CT gave further insight into the injuries showing the degree of displacement and confirmed that the talus was also fractured. Manual reduction of the displaced tuber calcanei was attempted but unsuccessful. The heifer was then taken to surgery where an open fracture reduction was performed and a string of pearls plate and screws were placed on the calcaneus. She was placed in a sleeve cast prior to recovery for increased stability. This presentation will focus on the anatomy of the bovine tarsus, its similarities and differences with the equine tarsus, and computed tomography.
Heifer; Bovine tarsus anatomy; Bovine tarsus fracture; Computed tomography; Case Studies
dissertation or thesis