Even in this time of uncertainty, Mayo Clinic is a place for hope and healing — and we're delivering the care you need. Mayo Clinic follows carefully designed, rigorously enforced safety precautions for anyone who needs face-to-face care. We're safely treating all patients, both in person and through virtual visits, in adherence with federal and state executive orders and guidance. Dr. Castle is a urologist and Co-chair of the Prostate/Non-prostate Genitourinary Committee at Mayo Clinic’s Arizona campus, treating bladder and prostate cancers. His interests include urologic oncology, robotic/laparoscopic surgery, prostate and bladder cancer research, kidney cancer research, testicular cancer, cancer hormonal and gene research, robotic bladder surgery/cystectomy, robotic retroperitoneal lymph node dissection and robotic kidney surgery. Dr. Castle received his medical degree from University of Texas, Southwestern Medical School. Mayo Clinic’s Arizona campus is ranked the #1 hospital in Arizona according to U.S. News & World Report.