It was once believed these tumors had a guarded to poor prognosis and that the survival times were short. The most recent
studies suggest that with multi-modal therapy the prognosis is fair. The reported survival time for 104 dogs treated with
surgery, radiation therapy, chemotherapy or a combination of these modalities was 544 days (Williams, 2003). In a second study,
it was found that dogs treated with a combination of surgery, radiation therapy and mitoxantrone chemotherapy had control
of their tumors for a median of 287 days and had survival times of almost 2.5 years (Turek, 2003).