Education Leadership

innovator, urology, cutting edge techniques, robotic surgery, kidney disease, cure, inventor

Benjamin R. Lee, M.D.

Professor & Chief of Urology 

Director, GU Cancer & Disease Oriented Strategic Planning Team; University of Arizona Cancer Center Professor of Surgery


Research Interests:

  • Advancing new treatments for renal cell carcinoma
  • Developing new technologies & techniques for Urologic Oncology
  • Clinical research trials
  • Nanotechnology
  • Integration of Urology, Biomedical Engineering, Biomolecular engineering, Pathology, and Physics and Materials Engineering


innovator, urology, cutting edge techniques, robotic surgery, kidney disease, cure, inventor

Joel T. Funk, M.D.

Chief of Surgical Services BUMC South 

Assistant Professor, Director of Urology at Banner University Medical Center - South Campus


Research Interests:

  • MRI imaging
  • Evaluation of pelvic organ prolapse
  • Long term outcomes from HoLEP
  • Prostate cancer risk
  • Histologic evaluation of the pathogenesis of benign prostatic hypertrophy
  • MR Fusion biopsy in the diagnosis and decision making in prostate cancer


urology, female urology, pelvic floor disorders, interstitial cystitis

Christian O. Twiss, M.D.

Director, Female Urology

Pelvic Medicine and Pelvic Reconstructive Surgery; Associate Professor of Surgery


Research Interests: 

  • Incontinence and vaginal prolapse treatment
  • Urodynamics
  • Interstitial cystitis
  • Outcomes research in incontinence and pelvic reconstructive surgery


urology, male incontinence, urethral stricture, genitourinary trauma

Matthew B. Gretzer, M.D.

Director of Genitourinary Reconstructive Surgery

Associate Professor of Surgery, Clinical Surgery Director, Genitourinary Reconstructive Surgery


Research Interests: 

  • Investigator in a study evaluating new therapy for male incontinence.
  • Urethral Stricture management outcomes. 
  • Genitourinary trauma management.
  • Voiding fluid dynamics