Mast Cell Tumors Beware! Our Oncologist has a mark on you!

Mast Cell Tumors Beware! Our Oncologist has a mark on you!   

When looking for advanced veterinary care, we are here for you with cutting edge treatment options. Dr. Irene Vazquez, our board certified oncologist is your neighborhood pet cancer specialist.

STELFONTA is a prescription medicine used in dogs to treat mast cell tumors on the skin or in the tissues just under the skin. Given as an injection directly into your dog’s tumor, it destroys the tumor by breaking down cancer cells and starving their blood supply. A “pocket” or wound is left at the injection site where the tumor was. This is generally a healthy wound ready for skin and hair to grow back in a few weeks.
Pretreatment involves oral medications, including corticosteroids and antihistamines, prior to the injection of STELFONTA. These medications are very important to reduce the risks associated with inflammatory substances that can be released from the tumor as the mast cells are destroyed. Premedication is given 2 days pretreatment and continues until 7 days post treatment. It is essential that you give all medications as prescribed.

Most dogs do not need sedation or anesthesia during the procedure although occasionally, dogs may be sedated.

Side effects reported in dogs treated with STELFONTA were generally mild and short lasting, but they can be severe, especially if not treated in a timely manner.

The most common adverse reactions included wound formation, injection-site pain, lameness in the treated limb, vomiting, diarrhea and hypoalbuminemia (low levels in the blood of the protein albumin). Although most side effects/adverse reactions seen in clinical studies were mild, the most serious side effects occurred in the first 4 days. Excessive pain, lameness, tiredness, refusal to eat for more than one day, repeated vomiting or diarrhea, trouble breathing, changes to the treated tumor site (including increased or excessive swelling and bruising, extensive wound formation, increased irritation) or any other symptoms should be examined immediately and treated accordingly.

When looking for advanced veterinary care, we are here for you with cutting edge treatment options. Dr. Irene Vazquez, our board certified oncologist is your neighborhood pet cancer specialist.

Irene Vazquez, DVM, MS, DACVIM (Oncology)