Nodular pyogranulomatous lesion on the face of a bovine
A nodular lesion in the left cheek, which ulcered the skin and had a cauliflower aspect, measuring about 10x10 cm in diameter, was found in a 3-year-old female, friesian breed, bovine carcass. From the oral cavity, a soft tissue proliferation could be observed above the left upper gum. Submandibular and parotid lymph nodes were increased in size.
The histopathological study classified the lesion as a chronic piogranulomatous stomatitis (inflammation of the mouth), the observed images were highly compatible with a case of wooden tongue, an infection by Actinobacillus lignieresii.
The microbiological culture however showed an abundant growth of Trueperella pyogenes. A bacterium usually associated with the presence of abscesses.
Within the differential diagnosis, neoplastic lesions such as a papilloma or squamous cells carcinoma should also be included.