Carcinomatosis in Cats: Diagnosis and Treatment Tips

Carcinomatosis in Cats

Carcinomatosis in Cats: Carcinomatosis is the spread of cancer cells throughout the body, also known as metastatic cancer. In cats, carcinomatosis usually means that cancer cells from a primary tumor have traveled through the bloodstream or lymph system to form secondary tumors in other parts of the body.

The most common types of cancer in cats that can lead to carcinomatosis include:

  • Lymphoma – Cancer of the lymph nodes and lymphatic system. Lymphoma is a common cancer in cats and often spreads to the liver, spleen and other organs.
  • Mammary gland carcinoma – Breast cancer in female cats that can metastasize to the lungs, liver and lymph nodes.
  • Squamous cell carcinoma – A type of skin cancer that can spread internally.
  • Osteosarcoma – Bone cancer that often spreads to the lungs.

Unfortunately, carcinomatosis in cats often carries a poor prognosis since the cancer has already spread significantly by the time it’s detected. Treatment options for cats may include:

  • Chemotherapy to slow the growth of cancer cells and relieve symptoms. Chemotherapy can help extend a cat’s life by weeks or months in some cases.
  • Radiation therapy to shrink tumors and reduce pain.
  • Surgery to remove primary tumors whenever possible, though surgery typically isn’t an option once carcinomatosis develops.
  • Palliative care to keep your cat comfortable with pain medication, fluids, and nutritional support.

The most important thing is to keep your cat happy and help them enjoy a good quality of life for as long as possible. With love and the support of your vet, you can help make your cat’s remaining time meaningful.

See also  Hartz Flea Treatment for Cats

Carcinomatosis in Cats

Diagnosing Carcinomatosis in Cats

Carcinomatosis, or the spread of cancer cells through the body, can be difficult to diagnose in cats. Your vet will run several tests to determine if your cat’s symptoms are caused by carcinomatosis or another condition.

  • Blood tests check for elevated levels of certain proteins like globulins that can indicate the presence of cancer cells. Complete blood counts can also detect changes in red and white blood cell counts that may point to carcinomatosis.
  • Imaging tests like x-rays, ultrasounds, CT scans, and MRIs are used to look for abnormal masses or fluid buildup in the chest or abdomen. These scans can also detect swelling of lymph nodes and other changes that may suggest carcinomatosis.
  • Cytology tests examine cell samples from fluids, lymph nodes, or masses. The cells are analyzed under a microscope to look for signs of cancer like abnormal size, shape, and number of cells.
  • Biopsies remove tissue samples that are then examined by a pathologist. Biopsies provide a definitive diagnosis of cancer and can determine the type of cancer cells present, like lymphoma, carcinoma or sarcoma cells.
  • Laparoscopy uses a tiny camera inserted into the abdomen to directly view the internal organs and look for signs of cancer like tumors, inflammation or fluid buildup. Laparoscopy also allows for guided biopsies of suspicious areas.

If carcinomatosis is diagnosed, further tests may be needed to determine where the primary cancer started and if it has metastasized to other organs. Staging tests can evaluate how far the cancer has spread to help develop an appropriate treatment plan for your cat. Early diagnosis and treatment of carcinomatosis gives cats the best chance of remission or long term management of the disease.

See also  Arthritis in Cats: Treatment Plans That Work

Treatment Options for Feline Carcinomatosis

Once carcinomatosis has been diagnosed in your cat, the treatment options will depend on the primary type of cancer and how far it has spread. The goals are to slow the progression, reduce pain and discomfort, and possibly extend survival time.


Chemotherapy uses anti-cancer drugs to destroy cancer cells in the body. It can be used alone or in combination with other treatments like surgery or radiation therapy. Chemotherapy is often the primary treatment for carcinomatosis, especially when the cancer has metastasized significantly. The drugs are usually given intravenously, but some can be administered orally at home. Some side effects like nausea or diarrhea can often be managed with medication.

READ ALSO: Bilious Vomiting Syndrome In Cats Treatment


Steroids, such as prednisone, can help reduce inflammation, relieve pressure from fluid buildup, stimulate appetite, and ease pain. They may be used alone or in combination with chemotherapy. Long term use or high doses of steroids can cause side effects, so your vet will monitor your cat closely.

Palliative care

If the cancer cannot be cured, palliative care focuses on managing pain and symptoms to keep your cat comfortable for as long as possible. This may include steroids, pain medication, appetite stimulants, and other supportive care. Your vet can also prescribe medication for common symptoms like nausea, vomiting, and diarrhea.

Clinical trials

New treatments for various types of cancers are being developed and tested in clinical trials. Participating in a trial could give your cat access to cutting-edge treatments that are not yet widely available. Talk to your vet about whether your cat may be eligible for any clinical trials of new therapies for their type of cancer.

See also  Home Treatment for Fleas on Your Cat

While carcinomatosis can be an aggressive disease, focusing on pain management and quality of life can help give your cat comfort during treatment or palliative care. With your vet’s guidance, the prognosis can often be improved by carefully monitoring your cat and making adjustments to the treatment plan as needed. Staying positive and enjoying every good day you have together will make a big difference.