Simple Summary An overview analysis of tumors in dogs and cats, dividing them into
malignant and benign, may provide previously unknown information about the biological
behavior of tumors in these species and may serve many veterinarians as a support for
clinical decision making. Based on a sample of 16,272 cancer records, including 3266 cats
and 13,006 dogs, the analysis found that cats have a fourfold risk of malignant tumors, as in
some topographies. Sex appears to play a role in the malignancy only in dogs. Some dog …

Analysis of canine and feline tumor malignancy data can help clinicians identify high-risk
patients and make more accurate decisions. Based on a sample of 16,272 cancer records,
including 3266 cats and 13,006 dogs, collected from January 2019 to December 2021 in the
Vet-OncoNet Network database, this study aimed to compare the tumor malignancy profile
between cats and dogs, considering animal-related factors (sex, age, and breed),
topography, and geographic location using a mixed-effects logistic regression model. Cats …