Widespread abdominal nodular lesions in a 6 months old pig
The bulk of the nodules measured between 1 and 5 cm in diamater but some of them where bigger, up to 15 cm. Meat inspectors suspected of a lymphoma.
Histopathology revealed a neoplastic proliferation of rounded to polyhedric cells with a high degree of anaplasia (undifferentiation) which were hard to identify morphologically as a pariticular cell type. No immunohistochemical markers indicative of a lymphoid population were found. Therefore, even it was not conclusive the most probable diagnostic was a mesotelioma of the abdominal serosa.
In a case like this one it is important to include mycobacteria in the differential diagnosis.
Multiple lesions in the splenic surface coalesce into a large mass. The intestinal serosa was also involved.
Superficial hepatic lesions.
Involvement of the kidneys, mesenterium and parietal peritoneum.
