Nechifor, FlorinDrugociu, Dan-GheorghePașca, Aurelian-SorinHrițcu, Luminița-DianaHârbu, Amalia-IoanaRoșca, Petru2026-06-102026-06-1020251454-7406https://repository.iuls.ro/handle/20.500.12811/6594Mammary tumors in cats are benign or malignant neoplastic formations characterized by abnormal and uncontrolled cellular proliferation, often influenced by hormonal factors such as estrogen and progesterone. These tumors differ in their potential for local invasion and metastatic dissemination. In September, most diagnosed cases occurred in females over 8 years of age (50.0%; 3 cases), followed by those aged 5–8 years (33.3%; 2 cases). Only one case (16.6%) was identified in the 3–5-year age group, and no cases were recorded in cats younger than 3 years. In October of the same year, of the 10 cases documented, the majority were again identified in females over 8 years of age (5 cases; 50.0%), followed by the 5–8-year age group (3 cases; 30.0%). The 3–5-year category accounted for 2 cases (20.0%). Similar to the previous month, in October, no mammary tumors were reported in cats under 3 years of age. It is noteworthy that unspayed females exhibit a significantly higher predisposition to such gynecological pathologies. Across the two months analyzed—September and October 2025—only 5 cats diagnosed with mammary tumors (45.5%) were spayed, whereas 11 (54.5%) were unspayed.EnglishAttribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)http://creativecommons.org/licenses/by-nc-sa/4.0/mammary tumorscatsbreedage distributionspayinghormone-dependent neoplasiaArticle2393-4603https://doi.org/10.61900/SPJVS.2025.04.08