Symptoms of Cat Cancer


If your cat has cancer, he might display telling signs such as weight loss, problems breathing and loss of appetite. Although those symptoms sometimes signify cancer in cats, they can sometimes indicate other illnesses, too. Take your pet to the veterinarian as soon as you notice any potentially cancerous symptoms.

Possible Cancer Symptoms

Some common indications of cancer in felines include:

  • weight loss
  • appetite changes
  • problems swallowing or eating
  • swelling
  • bleeding
  • bodily discharge
  • problems with elimination
  • excessive elimination
  • bloody fecal matter
  • bloody urine
  • excessive drinking
  • excessive urination
  • breathing trouble
  • sores or wounds that won't heal
  • unpleasant odors emanating from your cat's ears or mouth
  • unpleasant breath
  • the presence of bumps or lumps
  • behavioral shifts
  • anemia
  • vomiting
  • diarrhea
  • coughing
  • depression
  • lack of energy
  • reluctance to engage in physical activity
  • stiffness
  • excessive sleeping
  • lack of interest in playtime
  • signs of pain such as limping 

These symptoms can denote many of the diverse types of feline cancers. Note, however, that many of these symptoms can also point to medical conditions that aren't cancer. Unpleasant breath and weight loss, for example, can both be symptoms of kidney troubles in cats.

Specific Cancer Symptoms

It can be helpful for owners to be familiar with some common signs of specific cancers that appear in cats. Cats who have prostate cancer, for example, sometimes exhibit symptoms such as fever, full urine blockage, trouble urinating and ribbon-shaped stool.

Cats who have ear tumors often exhibit symptoms such as ear discharge, shaking of the head and itching. Ear tumors appear most frequently in cats who are at least of middle age.

Cancer Diagnosis

When a cat has a lump that could potentially be cancerous, a veterinarian might assess it by conducting a needle biopsy. This extracts a tiny tissue sample for purposes of microscopic cell analysis. The vet could also conduct surgery to extract the lump for pathologist diagnosis.

Vets also diagnose cancer in cats through various diagnostic tests. These tests include blood assessment, ultrasounds and radiographs.


  • If you think that your cat might have any cancer symptoms, take him to the veterinarian immediately. Since cancer leads to more fatalities in cats than any other disease, prompt veterinary attention is absolutely crucial. Early detection can increase your pet's chances of a successful recovery. As soon as you see an unusual bump or lump on your cat's body, pick up the phone to call the vet. Never assume that a bump on your cat is benign. Although lumps typically are innocuous, there are many exceptions.

    Pet your cat regularly to check for the emergence of any unusual bumps or lumps. It's often particularly simple for owners to detect bumps on their cats' legs and backs. Be thorough when you assess your pet for bumps and lumps. Feel his entire body including his mouth and just below his neck.

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