18790 Middlebelt Rd

Livonia, MI 48152 US

(248) 615-7670

Open mobile navigation

Mast Cell Tumor (Mastocytoma) in Cats

We Are Your Livonia Veterinarian for All of Your Pet Care Needs

If you are looking for a Livonia Animal Hospital that offers quality veterinary care to your pet from domestic to exotic pets, look no further than Sheehy Animal Hospital. We serve the area pets with the best in care for exams, dental check-ups and services, vaccinations, surgery, dermatology, parasite prevention, senior wellness, and more. We treat cats with Mastocytoma in clinic, so if your pet shows signs of tumors, don't fret, just give us a call to set up an appointment.

We Are Your Livonia Veterinarian for All of Your Pet Care Needs

What Is Mastocytoma?

Mastocytoma, a.k.a. Mast cell tumors, are tumors that consist of mast cells. These cells are a type of white blood cells and occasionally they can turn into a tumor on your pet's skin or internal organs. Mast Cell tumors of the skin are benign 90% of the time. This means that they are not cancerous, nor particularly worrisome. Mast Cell Tumors of the internal organs can cause negative symptoms and are more problematic than those on the skin. Cats over four years old have a higher risk of having these tumors.

Symptoms of mast cell tumors on the skin include hairless raised bumps or lumps that your cat may or may not itch at depending on his body's histamine reaction to the tumor. Symptoms of mast cell tumors on internal organs include lethargy, weight loss from decreased appetite, vomiting, and general illness in your pet.

How Can We Treat Mast Cell Tumors?

The first step is diagnoses. We typically do a simple biopsy on tumors of the skin, and a more complex biopsy on internal tumors. Once we have officially diagnosed the mast cell tumor, we offer you a treatment plan.

Treatment for skin tumors is typically simple removal of the mass without too much discomfort for your cat. If your cat has a skin mastocytoma his prognosis is good, and he will likely live a long healthy life after treatment.

Internal tumors are more complex. We will remove the tumor from the affected area, and the long term prognosis will depend on the area the tumor is located. If it is in a localized area then the prognosis is better than the tumor spreading out. 

Contact Us for More Information about Mast Cell Tumors and to Schedule Your Pet's Appointment Today

If your pet shows signs of mast cell tumors, or other conditions, or if your pet is in need of a basic check-up, call us at Sheehy Animal Hospital. We serve the Livonia area with quality pet care for your cats, dogs, birds, pockets pets, and exotics. Call today, (248) 615-7670.

Exclusive Offer

New clients receive $20 OFF first exam!

Office Hours


9:00 am-7:00 pm


9:00 am-7:00 pm


9:00 am-7:00 pm




9:00 am-7:00 pm


9:00 am-5:00 pm





  • "I love this veterinary clinic. Dr. Sheehy and staff are all friendly and seem to take pride in their jobs. I enjoy taking my three rats there and would recommend them to everyone I know."
    Cheyenne H / Livonia, MI

Featured Articles

Read about interesting topics

  • Sugar Gliders

    Thinking of getting a sugar glider? These tiny marsupials are energetic and friendly, making them popular choices as pets. Though they weigh less than a half-pound, they're more closely related to kangaroos than they are flying squirrels. If you think a sugar glider would make an ideal pet for your family, ...

    Read More
  • Prairie Dogs

    Prairie dogs are cute, affable creatures. But before taking one on as a pet, check your local laws. In some states, such as Colorado, it's illegal to keep prairie dogs as pets. Mostly, this is because they may spread monkeypox. If you live in a state that welcomes pet prairie dogs, be sure to buy from ...

    Read More
  • How to Help Your New Cat Feel Welcomed in Your Home

    Adopting a cat or kitten? Here's what you can do to help your cat adjust to its new home. ...

    Read More
  • Skunks

    Home and Veterinary Care for Pet Skunks If you're an adventurous pet owner, you may love exotic animals such as skunks. You'll be happy to learn that skunks can indeed make excellent domestic pets, but only if they receive the proper care to enjoy a happy, healthy life. Your veterinary team can help ...

    Read More
  • Flying Squirrels

    Much like sugar gliders, flying squirrels make affectionate pets when purchased young and raised by their owner. Unlike sugar gliders, however, flying squirrels are rodents that need veterinary care specific to the species. Your veterinary team can help with the care and treatment of flying squirrels. ...

    Read More
  • Fennec Foxes

    Fennec Fox Care Guide With oversized ears and mischievous faces, fennec foxes are cute as can be. But these exotic pets require a lot of care to stay healthy and happy. Health At just three pounds, fennec foxes are the smallest member of the fox family. Native to the Sahara desert, fennec foxes are ...

    Read More
  • Fish

    If you’re thinking of getting a pet fish, you should know that your veterinarian has a lot of good advice about pet ownership. Fish can be very rewarding as pets, and you just may be surprised about how much fish actually interact with their owners. Here’s more valuable information about choosing ...

    Read More
  • Snakes

    If you’re looking for a low-maintenance pet, then you might be interested in owning a snake. However, there are a few aspects of owning a snake that you need to be aware of before you make this type of commitment. Here’s what you need to know. What to Know Before Choosing a Pet Snake Before you purchase ...

    Read More
  • Domestic Pigs

    Pigs are great for families who want a relatively exotic but easy to care for a pet. Whether miniature, like a pot-bellied pig, or a full-sized animal, caring for a pig is similar to caring for a cat or dog. Health Domestic pigs need to see a veterinarian regularly for vaccinations and checkups. We ...

    Read More
  • Gerbils

    Gerbils are great little pets for pet owners who don't have room for a dog or cat. They're friendly and fun to watch, but they do take a moderate level of care and investment. If you're thinking of getting a gerbil, here's what you'll need to know to keep him happy and healthy, including giving him a ...

    Read More

Newsletter Signup

Sign up for more articles