Fragmented medial coronoid process is common in dogs, but has only been described in the cat once historically.
This case describes a case of presumed traumatic fragmented medial coronoid process in a cat, which presented for right thoracic limb lameness of 3-month duration, which did not respond to medical management. A computed tomography study demonstrated the fragmented medial coronoid process, and surgical removal of the fragment was performed via arthrotomy without complication. Histological examination of the fragment did not show microdamage of the bone or osteocyte loss, which is evident in developmental cases of fragmented medial coronoid process, and was suggestive of a historical fracture that resulted in non-union.
The patient improved postoperatively, but still experiences intermittent lameness after periods of exertion.
