biostudies-literatureJing ZSchool level scientific research project of Jiangsu Agri-animal Husbandry Vocational Collegee0314292https://www.ebi.ac.uk/biostudies/studies/S-EPMC11584073biostudies-literatureUnknown19(11)Objective of this study is to investigate the epidemiological characteristics, clinical features, and treatment outcomes of canine mammary tumors in Dalian, providing insights into prevention and management strategies. A retrospective analysis was conducted on 198 cases of canine mammary tumors diagnosed in outpatient departments across several veterinary hospitals in Dalian. Data on breed, age, sex, tumor location, and clinical staging were collected and correlated with treatment modalities and prognosis. Poodles, Chinese pastoral dogs, and Cocker Spaniels exhibited higher incidence rates. The majority of affected dogs were middle-aged and older females, with unneutered dogs and those with a history of false pregnancies being at the highest risk. Benign tumors were more common in younger PloS oneEpidemiological investigation and surgical treatment of canine mammary tumors in Dalian, China, from 2019 to 2023.PMC11584073NSF2023CB14Jing ZJin HFeng JfalseEpidemiological investigation and surgical treatment of canine mammary tumors in Dalian, China, from 2019 to 2023.Objective of this study is to investigate the epidemiological characteristics, clinical features, and treatment outcomes of canine mammary tumors in Dalian, providing insights into prevention and management strategies. A retrospective analysis was conducted on 198 cases of canine mammary tumors diagnosed in outpatient departments across several veterinary hospitals in Dalian. Data on breed, age, sex, tumor location, and clinical staging were collected and correlated with treatment modalities and prognosis. Poodles, Chinese pastoral dogs, and Cocker Spaniels exhibited higher incidence rates. The majority of affected dogs were middle-aged and older females, with unneutered dogs and those with a history of false pregnancies being at the highest risk. Benign tumors were more common in younger 2024-01-01T00:00:00Z20242025-04-04T13:41:41.94Z2025-04-04T13:41:41.94ZS-EPMC115840733957683110.1371/journal.pone.0314292