Pet cancer cases and patterns of treatment at a Spanish veterinary teaching hospital: a retrospective study from 2015 to 2024.

Malignant tumors are prevalent in aged, female, purebred dogs, often treated with surgery or chemotherapy.

A retrospective study conducted at the Veterinary Teaching Hospital of the University of León, Spain, from 2015 to 2024, analyzed 123 pet cancer cases, comprising 107 dogs and 16 cats. The mean annual incidence risk was 530 per 100,000 animals. The majority of cases were in dogs (87.0%), with a higher prevalence in females (62.6%) and purebred animals (77.2%). Age distribution showed that 78.9% were aged animals. Malignant tumors accounted for 87.8% of cases, predominantly of epithelial origin (40.7%), and were most commonly located in mammary glands (27.6%) and skin/mucosa (26.8%). Carcinomas (35.8%) and lymphomas (19.5%) were the most frequent histological types. Treatment modalities included surgery in 42.3% of cases, chemotherapy in 37.4% (mainly oral administration), and euthanasia in 26.8%. The primary pharmacological group used was QL01E (protein kinase inhibitors). ([frontiersin.org](https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2025.1588840/abstract?utm_source=openai))

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