Peer-reviewed veterinary case report
Multilobular Osteochondrosarcoma of the Vertical Ramus of the Mandible in a Cat.
- Journal:
- Topics in companion animal medicine
- Year:
- 2023
- Authors:
- Vedrine, Bertrand
- Affiliation:
- Surgical department · France
- Species:
- cat
Plain-English summary
A 7-year-old male domestic shorthair cat was brought to the vet because he had trouble opening his mouth and there was a hard swelling on the side of his head. A special scan showed a large, unusual mass in his jawbone that looked like popcorn, which was identified as a type of tumor called multilobular osteochondrosarcoma. The tumor was pushing on nearby structures but did not affect the joint that connects the jaw to the skull. The cat underwent surgery to remove the affected parts of the jaw, and afterward, he was able to open his mouth normally. He recovered well, and the biopsy confirmed the tumor type, marking this as the first reported case of this specific tumor in a cat's jaw.
Abstract
A 7-year-old castrated male domestic shorthair cat presented with locked jaw syndrome and firm swelling in the right temporal region of the skull. A computed tomography (CT) scan showed a heavily calcified mass of the right coronoid process of the mandible with a popcorn appearance, consistent with a multilobular osteochondrosarcoma. The zygomatic arch was displaced laterally and ventrally due to the mass effect. The temporomandibular joint was not involved. Surgical treatment was performed and consisted of the removal of the zygomatic arch and the vertical ramus of the mandible. It was possible to open the mouth normally immediately after surgery. Recovery was uneventful. Histological examination of the mass confirmed multilobular osteochondrosarcoma. This type of tumor is rarely encountered in dogs, and a literature search reveals only 2 cases in cats: 1 arising from the skull and 1 from thoracic wall. This case report documents the first description of a multilobular osteochondrosarcoma of the mandible in a cat.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/36990179/