Peer-reviewed veterinary case report
Rare bone tumor on the cheekbone in dogs and a cat
By Gold, Randi et al.·Published in Veterinary pathology·2019·1 Department of Veterinary Pathobiology, United States·View original on PubMed →
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Original publication title: Zygomatic Arch Parosteal Osteosarcoma in Dogs and a Cat.
Plain-English summary
A 5-year-old mixed-breed dog was brought in for facial swelling and chronic sneezing. After imaging tests, the vet discovered a rare tumor called parosteal osteosarcoma growing on the zygomatic arch, which is part of the skull. Although these tumors are usually slow-growing and low-grade at first, they can become more aggressive over time. Treatment options may include surgery to remove the tumor, and early intervention is crucial for the best outcome.
People also search for: dog facial swelling · sneezing dog tumor · zygomatic arch osteosarcoma treatment
Abstract
Parosteal osteosarcoma is a rare, slow-growing tumor most commonly arising from the surface of long bones. Tissue or histological sections from 5 dogs and 1 cat with zygomatic arch masses were examined. Clinical presentations varied from chronic sneezing to facial swelling. Imaging consistently demonstrated osseous proliferation in the area of the zygomatic arch. Histologically, the masses were characterized by well-differentiated fibro-osseous and chondroid components that radiated outward from the periosteum of the zygomatic bone. Cellular atypia and mitotic figures were uncommon. Parosteal osteosarcomas have previously been reported in the skulls of dogs and cats, but only 1 has been reported on the zygomatic arch. Initially, these tumors are of low histologic low grade, but with time, they can show more aggressive behavior and invade the underlying bone.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/30244660/