Mast cell tumors in dogs are treated with surgery, radiation, chemotherapy or a combination of the three, depending on the severity of the tumors. The most common treatment plan is surgically removing the tumor, reports PetEducation.com.
When surgically removing the tumor, the doctor also takes healthy skin surrounding the tumor because it is hard to figure out where the tumor ends, according to PetEducation.com. If enough skin cannot be taken around the tumor, or if surgery is not possible, radiation may be used. In cases where the tumors have spread to several places on the skin, certain chemotherapy drugs are administered along with surgery and radiation.