Histopathological findings of mammary tumours in male dogs and cats from a long‐term institutional cohort
Year: 2026
Type: article
Abstract: OBJECTIVES: To describe the proportion, histological type and grade of mammary gland tumours in a population of male dogs and cats at a single institution over a period of 17 years. MATERIALS AND METHODS: All histological specimens from mammary gland tumours in male dogs and cats submitted to the Pathology Service at a single institution in northern Italy between 2008 and 2025 were retrospectively reviewed. RESULTS: One hundred and ten tumours were identified in the study population: 83 tumours in 73 dogs and 27 tumours in 23 cats; multiple tumours were present in some animals. After exclusion of animals presenting with both benign and malignant tumours, malignant tumours were more prevalent in both species with 50/68 (73.5%) in dogs and 19/22 (86.4%) in cats, respectively. In male dogs, mammary gland V was most commonly involved, while mammary gland IV was most commonly involved in male cats. Complex carcinoma was most common in male dogs, and tubular carcinoma in male cats. Nodulectomy was the most commonly performed surgical procedure in both species. Low-grade (grade I) tumours were more common in dogs (37/46, 80%), and intermediate- (grade II) and high-grade (grade III) tumours in cats. CLINICAL SIGNIFICANCE: Mammary gland tumours in male dogs and cats were predominantly malignant. Caudal mammary glands were the most involved. Although there was a high proportion of malignant tumours in male dogs, the majority were grade I. Instead, intermediate- (grade II) and high-grade (grade III) tumours were more common in cats, supporting the aggressive nature of feline mammary gland tumours.
Source: Journal of Small Animal Practice
DOI: 10.1111/jsap.70103
Language: English
Topic: Veterinary Oncology Research
Subfield: Pulmonary and Respiratory Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W7128779707