Mammary Carcinoma in a Male Cat: A Diagnosis Worth Not Missing

Male cats can develop mammary carcinoma. The diagnosis should be on the differential list for any mammary region mass in a male cat, regardless of neuter status. Given that the vast majority of feline mammary tumors are malignant, histopathology is not optional — cytology alone is unreliable for distinguishing benign from malignant mammary lesions in cats.