Since most tumors are not visible on ultrasound, up to 40 % of clinically significant tumors are missed via this method, and many found are clinically insignificant. (sciencedaily.com)
Most tumors occur in dogs over age 10 with a greater number in males. (dog-health-guide.org)
Most tumors grow slowly and are not life threatening, but certain types of prostate cancer can spread to other organs and be fatal. (sciencedaily.com)