Dr. Costello is an oncologist at Mayo Clinic’s Rochester campus. His interests include testicular cancer, renal cancer and genitourinary cancers. Dr. Costello received his medical degree from the Medical College of Wisconsin. Mayo Clinic is ranked the #1 hospital overall according to U.S. News & World Report. The Mayo Clinic Cancer Center is designated by the National Cancer Institute as a comprehensive cancer center, and is the only NCI-designated comprehensive cancer center with three sites; with campuses in Jacksonville, Florida; Phoenix/Scottsdale, Arizona; and Rochester, Minnesota. Mayo Clinic’s Rochester campus is ranked #1 in more specialties than any other hospital in the nation according to U.S. News & World Report.