A Case of Peritoneal Malignant Mesothelioma in a Dog

In this case, biopsy samples sent from a private veterinary clinic to Burdur Mehmet Akif Ersoy University Veterinary Faculty Pathology Department were evaluated. In the macroscopic examination, whitish grayish cauliflower-like lesions were seen on the samples, varying in diameter 0.5-1.5 cm. Tissue samples with lesions were examined histopathologically after going through routine follow-up. In the microscopic examination, neoplastic mesotal cells with round or cuboidal shape, vesicular nuclei, anaplasic features such as anisocytosis, anionucleosis, and multinucleolus were found in some microscope fields. It was observed that these cells exhibited solid or fence-like arrays. In the neoplastic. tissue, hyalinized connective tissue and severe calcified areas were detected in some areas. In the light of these findings, the patient was diagnosed with peritoneal malignant mesothelioma.