Mammary Cancer Average Cost

From 228 quotes ranging from $3,000 - 8,000

Average Cost

$6,000

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What is Mammary Cancer?

Mammary gland cancers in cats are similar to breast cancer in humans. Mammary cancer is usually a malignant adenocarcinoma that appears in one or more of a cat’s breasts. Other forms of breast and mammary cancer in a cat include adenomas, duct papillomas, and sarcomas. Females, as well as males, can develop this form of cancer. When it appears in cats, it can be fatal, even if treated with surgery, radiation and chemotherapy. Adenocarcinomas are one of the most aggressive types of cancer, metastasizing or moving to the lymph nodes and other parts of the cat’s body. Siamese cats, cats between the ages of ten and fourteen years of age, and intact (not spayed) females are most likely to develop mammary and breast cancer.

Symptoms of Mammary Cancer in Cats

Cat owners and their vets will notice the following symptoms:

  • Swelling of the breasts or mammary glands
  • Infection in and around the glands and breasts
  • Skin ulceration surrounding the masses
  • Sores that don’t heal
  • Pain
  • Fever
  • Tumors appear as firm nodules firmly attached to the underlying muscle and skin
  • Clear, bloody, or milky discharge from the cat’s nipples
  • Dead (necrotic) tissue at the site of the tumor
  • Unexplained weight loss
  • Unwillingness to eat
  • Weakness

Causes of Mammary Cancer in Cats

Several factors seem to influence why cats develop mammary or breast cancer:

  • Leaving cats intact (not spayed)
  • Allowing the cat to have several heat cycles or litters before spaying
  • Cat’s age (cancer usually begins when cats are between 10 and 14 years of age)
  • Hormones: if cats receive medications with estrogen, they are more likely to develop mammary or breast cancer
  • Siamese, Persian and other Oriental breeds, as well as domestic shorthaired cats are at higher risk of developing tumors of the breasts or mammary glands at younger ages

Diagnosis of Mammary Cancer in Cats

When a pet owner brings in a cat with mammary and breast tumors, the vet will conduct a full physical exam, focusing most on the mass or masses. They will palpate the masses and nearby lymph nodes, looking for a spread of the mass. 

Once this part of the exam is done, the vet orders X-rays, which enable them to determine how big the tumors and whether it has spread. In addition, the vet may order an abdominal ultrasound, looking for a spread of the tumor to other organs. They may also carry out a fine-needle biopsy, where they aspirate lymph nodes to check for the presence of cancer cells. They will order a complete blood count and a biochemical profile, which allows them to check on the cat’s overall health. Other diagnostic tests may include urinalysis and a clotting profile of the drawn blood sample. 

If surgery is decided upon, the surgeon may take a small sample of the tumor and send it to pathology for a biopsy, especially if they are sure the cat has mammary or breast cancer. This biopsy allows the pathologist to determine exactly what kind of cancer the cat has.

Treatment of Mammary Cancer in Cats

When a pet owner brings in a cat with mammary and breast tumors, the vet will conduct a full physical exam, focusing most on the mass or masses. They will palpate the masses and nearby lymph nodes, looking for a spread of the mass. 

Once this part of the exam is done, the vet orders X-rays, which enable them to determine how big the tumors and whether it has spread. In addition, the vet may order an abdominal ultrasound, looking for a spread of the tumor to other organs. They may also carry out a fine-needle biopsy, where they aspirate lymph nodes to check for the presence of cancer cells. They will order a complete blood count and a biochemical profile, which allows them to check on the cat’s overall health. Other diagnostic tests may include urinalysis and a clotting profile of the drawn blood sample. 

If surgery is decided upon, the surgeon may take a small sample of the tumor and send it to pathology for a biopsy, especially if they are sure the cat has mammary or breast cancer. This biopsy allows the pathologist to determine exactly what kind of cancer the cat has.

Recovery of Mammary Cancer in Cats

Generally, the prognosis for cats with breast or mammary cancer is guarded, with a few exceptions. If the cat’s tumor is smaller than 2cm, it may survive for up to three years. Cats with tumors between 2 and 3cm may survive fur up to two years and cats whose tumors are larger than 3cm may survive for up to six months. If the cat’s treatment for small tumors that were caught early is aggressive, the cat may live for between two and three years. Cats who underwent large resections (having one or both mammary chains removed) lived post-surgery for up to three years while those cats who had only the tumor removed lived for only one year after surgery.

It benefits the cat to be seen immediately by the vet when its owner detects a suspicious lump.

Over 60 percent of tumors that have been removed will redevelop within 12 months. Because cancerous mammary tumors are so aggressive in cats, their overall prognosis is guarded, especially since these tumors metastasize.

Mammary Cancer Questions and Advice from Veterinary Professionals

Spool
Persian
9 Years
Fair condition
1 found helpful
Fair condition

My cat had a tumor, we got it all out (cleared with biopsy)
Now only 3 monthes after she seems to have another tumor (not where the previous one was) but it's where she had stitches, not sure if it was there before- could it be scarring?
Should I put my cat through another operation? Is it wise to remove the whole chain? What are the odds for survival? I don't know how old she is but we're assuming around 9-10
She does not seem to be in pain, has great appetite and acts the same.

Dr. Callum Turner, DVM
1680 Recommendations
If the swelling is at the incision site, it may be a seroma which is a fluid filled pocket which occurs after surgery in some cases; without examining Spool I cannot say for sure but is it a possibility. I would have your Veterinarian check it out to see what's happening and to ease your concerns; your other questions would vary widely so an answer wouldn’t give any precise information. Regards Dr Callum Turner DVM

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Abbey
Black
12 Years
Serious condition
-1 found helpful
Serious condition

Hi my cat has breast cancer and has a horrible smell and oozing from the infected area. Is that harmful to humans? When she was diagnosed with this we looked into information regarding this type of cancer and opted not to put her through any surgery being she was older in age. November will be a year since diagnosis.

Dr. Callum Turner, DVM
1680 Recommendations
Whilst it isn’t directly harmful to humans, it is not pleasant and may drip infected material around your home which isn’t good; especially if you have young children. You should visit your Veterinarian for a course of antibiotics and to get it drained and cleaned up. Whilst you may not want the surgical route, it may be required if the infection is severe but this would need to be discussed with your Veterinarian. Regards Dr Callum Turner DVM

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