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Common Pet Conditions

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and sometimes ulcerate. Advanced cases may lead to weight loss (1) attached (1) lethargy (1) One or more small lumps in the mammary chain that grow over time (1) or respiratory signs if metastasis occurs (1) they may be firm (1)
Symptom matches are best-effort. If a symptom is severe or sudden, contact a veterinarian promptly.

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Image for Mammary Tumors (Feline Mammary Carcinoma)
Mammary Tumors (Feline Mammary Carcinoma)
Cat - Primarily unspayed or late-spayed females (85–90% are malignant); rare in males
One or more small lumps in the mammary chain that grow over time they may be firm attached and sometimes ulcerate. Advanced cases may lead to weight loss lethargy or respiratory signs if metastasis occurs

Cancerous tumors of the mammary glands; the third most common cancer in cats. Most are malignant adenocarcino…

For pet owners
Use this page to learn what a symptom can mean, what to track at home, and when to get help. Bring notes to your appointment (timeline, appetite, water intake, urination, stool, vomiting episodes, medications and supplements).
For veterinary perspective
Each condition page summarizes common presentations, typical evaluation steps, and treatment approaches. It is not a substitute for diagnosis. Your veterinarian will consider breed, age, exam findings, and tests.