Mammary Tumor In Cats: Signs, Causes And Natural Treatment

Cats suffer similar health conditions to humans among which is the Mammary Tumor in Cats which is also known as the Feline Mammary Tumor some also called it Breast Cancer in Cats.

Mammary tumors In Cats occur due to abnormal replication of the cells that make up the breast tissue. It can be benign and without proper treatment, it easily becomes malignant, which means it is cancerous, and it metastasizes or spread to nearby lymph nodes or other areas of the body.

The mammary tumor is most common in female cats than in males. To learn more about this disease including Signs of Mammary Tumor in Cats to watch out for, ensure you read through to the end.

Mammary Tumor In Cats: Signs, Causes And Natural Treatment

Mammary Tumor in Cats
Mammary Tumor in Cats

Mammary Tumor in Cats is in two forms. It is benign (non-cancerous) or malignant (cancerous). These two forms of the disease have different diagnoses and different treatment approaches.

The majority of mammary tumors in cats are cancerous. This makes the disease very dangerous, a mammary gland tumor on your cat is almost a life-threatening situation.

Majority of mammary cancer disease is adenocarcinoma, a type of cancer that affects the epithelial cells located beneath the outer layer of the breast tissue. This gives rise to high rate of metastasis and spread of these tumors to other organs in the body.

Watch this video to learn more about mammary tumor in cats



Cause Of Mammary Tumor In Cats.

Mammary Cancer in Cat
Mammary Cancer in Cat

Feline Mammary Tumor is among the most common tumors that affect cats. We were interested to find out the cause of this aggressive disease in cats.

Unfortunately, the definite cause of Mammary Tumor in Cats remains a mystery and yet unknown. Some believe that hormones play an integral part in their development.

Furthermore, others typically suspect that the causes of mammary cancer include environmental factors or exposure to known carcinogenic chemicals.

These two factors are considered to have a direct correlation with mammary gland tumors. However, the presence of sex hormones is considered to be the largest connection to mammary gland tumors.

In addition, the age and breed of cats are believed to play a vital role in tumor development. Mammary cancers occur mainly in middle-aged to cats that are around 10 years of age and older.

Symptoms Of Mammary Cancers In Cats.

picture of Mammary Tumor in Cats
picture of Mammary Tumor in Cats

Our discourse on Feline Mammary Tumor in cats won’t be complete without including Symptoms of Mammary Tumor in Cats. At the initial stage of the disease, the mammary gland tumor in your cat will have few, most times unnoticeable symptoms.

It is until the tumor begins to grow that your cat will experience any form of pain or discomfort.

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Following are the Symptoms of Mammary Tumor in Cats:

  1. The appearance of bumps or masses below the skin in the mammary or breast region. Mostly, the masses are next to or within the nipple. Also, the size of the masses, as well as their appearance, may vary, but they are typically firm and nodular.
  2. Ulceration (opening), or wound that will not heal, in the breast area with consistent bleeding.
  3. The affected area tends to feel warm when touched and becomes painful.
  4. Uninterested in exercise especially if your cat is the energetic and playful type.
  5. Loss of appetite as the disease progresses and cancer spreads to other body areas.
  6. Depression or lethargy set in as cancer spreads to other systems of the body.
  7. Difficulty in breathing if cancer has spread to the lungs.
  8. Loss of hair
  9. Due to infection, a strong odor may rise from the affected part.

Diagnosis Of Mammary Tumor In Cats.

veterinary care should be sought quickly for the best possible outcome. Mammary Tumor in Cats is a grave illness and should not be treated with light esteem.

During a physical examination, the mammary tumor is found as either singular or multiple nodules along your cat’s abdomen. Afterward, other examination procedures are carried out for a definitive diagnosis.

X-ray examinations will be required. X-rays of the chest and head will be carried out. This will help to identify the particular body area where the tumor is located and its approximate size.

Also, the result of the X-rays will further reveal whether cancer has begun to spread to other body areas, which is helpful to come up with the best treatment option that would be most appropriate for your cat.

Furthermore, a fine needle biopsy will be required. It is performed with a needle inserted into the tumor to extract cells. The sample is then submitted for an examination performed by a veterinary pathologist under a microscope.

The result is sometimes used for the definite diagnosis of cancerous tumors. However, the procedure can be overlooked given the high percentage of cancerous tumors.


Treatment Of Mammary Tumor In Cats.

You must be eager to find out the Treatment of Mammary Tumor in Cats. Straightway,

Surgery is the most widely used treatment for Feline Mammary Tumor. It is considered the best treatment option especially when there is a single mass present or several masses which warrant mastectomy (removal of one or both breast tissue).

Typically, surgery is performed alone or in combination with chemotherapy.

Chemotherapy comes in handy considering the tumor size as well as other factors especially given the high metastatic rate in these tumors.

Natural Treatment Of Mammary Tumor in Cats.

Feline Mammary Tumor
Feline Mammary Tumor

Feline Mammary Tumor has given most cat owners great concern and has led to the search for different Treatments of Mammary Tumor in Cats that can help extend the life of their pet.

However, once a cat is diagnosed with a mammary tumor, the prognosis is often poor.

For Natural Treatment of Mammary Tumor in Cats, there are several plant-based support for mammary tumors, and the products are vet-formulated and vet-approved to help ease pain and discomfort. Also, plant-based products help in balancing the immune system naturally.

You can talk to your veterinarian about including herbal supplements that can improve your cat’s health in its medication.

Preventive Measures Of Mammary Tumor In Cats.

Overall, the Treatment of Mammary Tumor in Cats will only extend the life span of your cat for a little period. That is why you should try all that is possible to prevent your cat from developing a mammary tumor.

One of the ways to prevent Mammary Tumor in Cats is spaying a cat before 6 months of age. This will reduce the risk of mammary cancer development.

Cats that are spayed before their first heat which occurs when they are around 6 months of age has only 9% of the risk to develop mammary tumor compared to cats that are not spayed.

Also, you should try as much as possible to pay close attention to your cat and watch out for any symptoms of tumors as well as focusing on the glands closest to the hind leg area.

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Plus, you should regularly take your cat for a wellness check and consult with your vet for any diagnosis or treatment.

Prognosis Of Mammary Tumor In Cats.

The Treatment of Mammary Tumor in Cats can be effective if detected early and treatment commences immediately. The most significant prognostic factors of survival in Feline Mammary Tumor in cats are tumor size, the extent of surgery, and histologic grading.

Tumour size is a singular most important prognostic factor because studies have shown that cats with tumors larger than 3 cm in diameter have an average survival period of 4 to 6 months.

Cats with tumors 2 to 3 cm in diameter have a survival period of about 2 years, and cats with tumors less than a 2 cm in diameter tumor have a survival period of over 3 years.

Cat Breeds That Are Prone To Mammary Tumour.

You might be wondering which breed(s) of cat is most vulnerable to this disease.

The Siamese cats and the Domestic Shorthairs are the common cats that are prone to mammary cancer.

The Siamese cats and the Domestic Shorthairs cats and have higher incidence rates than other breeds.

Also, Cats that are  between 10 to 12 years are prone to have mammary tumor. Most affected cats are females and are typically younger when diagnosed.

Here are the few questions commonly asked by cats owners who care about their pets;

Are Mammary Tumors In Cats Painful?

No, usually pains are not associated with mammary cancer excerpt when it’s in the last stage when it’s not properly handle.

In cats, a mammary (breast) tumor is a common tumor. A fluid-filled or hard lump linked with the breast gland, or discharge originating from the nipple, maybe the first symptom of this kind of cancer.

These tumors are rarely unpleasant or painful, but if the discharge is present, they may be associated with increased grooming behavior.

Can Cats die From Mammary Tumors?

No, if it is diagnose at early stage and it is properly handle. But if it’s not diagnose early, it can lead to the death of a cat.

In feline mammary cancer, tumor size is one of the most reliable prognostic variables. According to prospective and retrospective studies in cats, cats with tumors smaller than 2 cm or 8 cm3 can have great long-term survival (> 3 years) if treated with surgery alone (radical mastectomy).

Is Mammary Cancer Curable In Cats?

No, it can not be cure, but it can be manage and taken care of.

The size of the tumor at the time of diagnosis is the most critical factor in determining prognosis.

The prognosis is better if the tumor is smaller than 2 cm in diameter; cats often live for more than 3 years. Tumors with a diameter of more than 3 cm have a survival rate of just 4 to 6 months.

What Percentage Of Mammary Gland Tumors In The Cats Are Malignant?

Approximately 85 percent of feline mammary tumors are lethally malignant adenocarcinomas, according to Margaret McEntee, DVM, a professor of oncology at Cornell University’s College of Veterinary Medicine.

How Long Can A Cat Live With A Mammary Tumors?

On average, cats with tumors greater than 3 cm in diameter live for 4 to 6 months; cats with tumors 2 to 3 cm in diameter live for around 2 years, and cats with tumors smaller than 2 cm in diameter live for almost three years.

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Can A Mammary Tumors Burst?

Yes, it can Burst if not taken care of and not been diagnose earlier.

The tumor is tiny and feels like a stone or dried pea, but it becomes larger with time. As soon as feasible, the tumor should be surgically removed in the hopes of eliminating it completely.

Breast tumors that are left untreated grow bigger and harder until they break through the skin, causing an infected, odorous ulcer.

Can Cats Mammary Tumors Be Benign?

Benign tumors make up around 10 percent of feline mammary tumors, indicating they will not spread beyond their local area. For any breast tumor, surgical removal at the earliest feasible chance has shown to be the most successful treatment option. Curative is the full surgical removal of benign tumors.

How Can I Shrink My cat’s Tumor?

Surgery and radiation treatment both have the potential to treat or reduce tumors to relieve pain and enhance the quality of life. Radiation treatment is typically provided in big metropolitan areas at teaching hospitals of veterinary colleges and veterinary specialty clinics.

How Much Does Tumor Removal For A Cat Cost?

Mast cell eradication typically costs $500 to $1,000. The cost of a board-certified surgeon is likely to increase by two- to five-fold if access to the site is problematic (for internal tumors or for less surgically accessible sites on the skin).

When Is It Time To Put A Cat Down With Cancer?

Euthanasia should be considered in cases of persistent and incurable inability to eat, vomiting, symptoms of pain, anxiety, or discomfort, or trouble breathing. It is up to you and your family to make an informed decision about your cat’s quality of life.

Are All Tumors In Cats Cancerous?

Unfortunately, one out of every five cats will develop cancer. Cats are prone to lymphoma, squamous cell carcinoma, mast cell tumors, and bone cancer. If discovered early, several types of cancer can be cured.

Why Does My Cat Have Lumps Under Her Nipples?

As with humans, cats are prone to breast cancer and mammary gland tumors, two of the most prevalent kinds of cancer. On the cat’s underbelly, near the nipples, they are usually not visible until they are big. These tumors may initially feel like BB pellets.

Do Cat Tumors Smell?

Healthy cats do not have a foul odor. Any wounds that are persistent and do not heal can have a foul odor and should be examined by an expert.

Are Tumors In Cats Hard Or Soft?

Usually, they are not hard and not harmful. When they appear, they seem like elevated and frequently hairless lumps that may feel hard or soft.

Treatment is not required unless the fibromas are cancerous or interfere with the cat’s activity or looks.

Are All Mammary Tumors Malignant?

Most breast tumors are malignant (cancerous), and around half have already spread by the time they are diagnosed. It is a very aggressive form of breast carcinoma, yet it accounts for fewer than 5% of all mammary cancers.


Mammary Tumor in Cats is a severe health condition that requires utmost attention and prompt treatment. The disease is the third most common disease in cats responsible for over 50% of cancer in cats.

Detecting and immediate commencement of treatment when the tumor is at an early stage and yet to metastasize provides your cat with the best chance of long-term control.

This means pet owners should be watchful and pay close attention to their pets to easily identify any change in health behaviors.


Author: David Arthur

David's lifelong passion for animals blossomed into a dream profession in 2020. He founded Petscareway Inc., a professional pet care company situated in the Texas. Several veterinarians have educated him in Pet First Aid and CPR since 2003. David decided to become a certified Pet First Aid and CPR instructor in 2011 after completing an instructor training course. David decided he had to be a part of ProPetHero when he discovered them in 2016 and saw how they were offering ER veterinarian-led training to everyone. As a result, he became a member of the ProTrainings family, the designers of ProPetHero. He volunteers and fosters for The Boxer Rescue Inc in his spare time, is a health-conscious Boxer breeder, and is a member of the Middlesex Boxer Club and Wachusett Kennel Club. David has served as a mentor to many people in the pet industry and in the small company world. When he's not working or helping, he's competing with his dogs in agility, lure coursing, and conformation trials across the country. David can be seen training with his puppies, hiking with them on trails, or playing in his backyard when he is not at a trial or trying to find a nice home for a Boxer through the rescue.

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