Osteochrondroma - Ringo

“Ringo” a 6 month old Exotic Shorthair presented to SeattleVeterinary Specialists for inability to open his mouth and intermittent perfuse oral hemorrhage while eating.

“Ringo” 6mo Exotic Shorthair

“Ringo” is a 6 month old Exotic shorthair that was surrendered to a local veterinary clinic due to his inability to open his jaw. He has a history of front declaw and a cryptorchid neuter procedure at another hospital, and is currently being treated for dermatophytosis (ringworm - hence the name “Ringo”). On presentation, it was determined that Ringo was not able to open his mouth. He can only eat “pâté” consistency canned food by licking his food. Moderate oral hemorrhage was observed every time Ringo ate (see photo on the left) most likely from trauma. The bleeding was severe enough that Ringo was becoming anemic (PCV = 15%).


Diagnostic Imaging

Radiographs revealed a region of thickening in a portion of the caudal aspect of the right side zygomatic arch, which was interfering with movement of the adjacent hemimandible. CT revealed an osseous lesion that arose from the lateral surface of the vertical ramus. In some aspects, the lesion looks like it came from the zytomatic process of the temporal bone as well. “Ringo” was taken to SVS for surgery. The plan was to remove the osseous lesion preventing him from opening his jaw. This would include removing the caudal zygomatic arch, mandibular coronoid process, and mandibular condyle. The biopsy of the lesion was consistent with a benign osteochrondroma.



“Ringo” received a blood transfusion and was prepped for surgery. The surgery was performed by Michael Mison, DVM, Dipl. ACVS and his surgery team. Ringo is doing great postoperatively. He is so happy that he can now eat in less than 10 minutes (without bleeding), meow, and even yawn!