Abstract
A ten-year-old beef suckler cow was referred to the Scottish Centre for Production Animal Health & Food Safety of the University of Glasgow, because of facial swelling in the region of the right maxilla. The facial swelling was first noticed three months earlier and was caused by a slow growing oral mass which contained displaced, loosely embedded teeth. The radiographic, laboratory and clinicopathological findings are described. Necropsy, gross pathology and histological findings confirmed the mass as a maxillary osteosarcoma.
Highlights
Facial swelling in farm animals can be caused by various diseases and trauma and often involve soft tissues or bone of the oropharynx
Abattoir surveys indicate that the general incidence of neoplasms of the oropharynx in cattle is low [1,2] with tumours such as carcinomas, fibromas, sarcomas and papillomas [3,4,5,6] reported most commonly
Histological investigation undertaken post mortem revealed a diagnosis of maxillary osteosarcoma
Summary
Facial swelling in farm animals can be caused by various diseases and trauma and often involve soft tissues or bone of the oropharynx. Diagnostic imaging, pathology and other diagnostic methods can be used to correctly diagnose oral masses, consider possible treatment options and predict prognosis This case report describes the radiographic, laboratory and clinicopathological findings of a rare maxillary osteosarcoma in a beef suckler cow. Laterolateral radiographs of the head showed that the maxillary premolar and molar teeth were displaced or missing and that parts of the sinuses and oral cavity had been replaced by soft-tissue and bone opacities. The combination of bacterial, culture, histology and radiographic results failed to support a diagnosis of either, actinomycosis, actinobacillosis, tooth root infection, salivary gland or sinus pathologies or fracture of facial bones. The mandibular lymph nodes were irregularly shaped and enlarged to approximately two times normal size Rod shaped organisms were not detected on Gram stains performed of the node but a Pasteurella-like organism was isolated on routine bacteriological culture
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