Leonard S. Marks, MD
Professor and deKernion Endowed Chair in Urology, Dr. Marks received his medical degree from the University of Texas, graduating with AOA honors and a Masters of Arts in Physiology in 1969. He was named a Fellow and Post-Doctoral Research Scholar at UCLA School of medicine and completed his residency at UCLA. Dr. Marks's current research focuses on improving prostate cancer diagnostic measures and outcomes; exploring and assessing efficacy of active surveillance and various focal therapy treatments, including cryoablation, HIFU, and FLA for primarily low- to intermediate-risk prostate cancer. He is an authority in targeted MRI fusion prostate biopsy and has authored more than 120 peer-reviewed scientific publications on prostate research.
Wayne Brisbane, MD
Dr. Brisbane obtained his medical degree from Loma Linda University School of Medicine in California. He completed a residency in Urology at the University of Washington. His research at the University of Washington included work at the Center for Industrial and Medical Ultrasound where he studied novel ablative therapy for kidney cancer using focused ultrasound. Starting in July of 2019 Dr. Brisbane began a two-year fellowship in Urologic Oncology at UCLA. Dr. Brisbane's current research evaluates novel imaging modalities for the diagnosis of prostate cancer. He is also involved in research on robotic surgery of the prostate.
Merdie Delfin, RN
Merdie Delfin is a nurse practitioner and research coordinator who joined Dr. Marks's research team in 2016. She graduated from Loyola Marymount University with a Bachelor's Degree in Psychology and a minor in Biology. She then went on to obtain her nursing license and graduated with a Master's Degree in Nursing from the University of San Francisco. Merdie has worked in various inpatient, outpatient and research settings at Kaiser San Francisco, NYU Langone Medical Center and New York-Presbyterian/Weill Cornell Medical College. In 2018, she acquired a California nurse practitioner license and American Nurses Credentialing Center (ANCC) certification as a Family Nurse Practitioner. She currently assists Dr. Leonard Marks in managing studies and patients' clinical needs involving MRI/US fusion biopsies, active surveillance of prostate cancer, focal therapy (HIFU, cryoablation and focal laser ablation) and micro-ultrasound imaging.
Kyle Crisostomo, LVN
Fusion Biopsy Operator
Kyle von Crisostomo is a Licensed Vocational Nurse who has been working with UCLA’s Clark Urology Department since 2018. He is currently a part of Dr. Leonard S. Marks’ multi-disciplinary team, which is focused primarily on low to intermediate risk prostate cancer. Kyle holds a certification in the operation of the Artemis fusion device and is currently assisting as the main clinical nurse and fusion biopsy operator for the patient care under Dr. Marks’ practice.
Rory Geoghegan, PhD
Dr. Geoghegan obtained a bachelor's degree in Mechanical Engineering from University College Dublin (Ireland), a master’s degree in Biomedical Engineering from Imperial College London (U.K.) and a doctorate in Bionengineering from University of California, Los Angeles. His primary research interest is the development of minimally invasive surgical technology including robotic surgery, thermal ablation and novel imaging modalities.
Samantha “Sam” Gonzalez, MA
Ms. Gonzalez joined the UCLA Institute of Urologic Oncology in 2021. She received her Bachelor’s degree from UCLA in Anthropology & Egyptology and her Master’s degree from Missouri State University in History. She is currently assisting Dr. Leonard S. Marks’s prostate cancer research studies, including active surveillance and low to intermediate-risk prostate cancer treatment. Ms. Gonzalez holds a strong passion for patient care and research.
Jake Pensa, MS
UCLA PhD Candidate
Henry Samueli School of Engineering and Applied Sciences
Jake Pensa is an engineering graduate student in the Henry Samueli School of Engineering and Applied Sciences at UCLA. His research is focused on multi-modality image registration and analysis for prostate cancer detection and treatment. Prior to pursuing a doctoral degree, he obtained B.S. and M.S. degrees from UCLA in bioengineering while working on system development of a tactile feedback device for minimally invasive robotic surgery.
Elizabeth “Eli” Tran
A clinical research coordinator with the UCLA Institute of Urologic Oncology, Ms. Elizabeth (Eli) Tran joined the team in the Summer of 2019, after graduating with a Bachelor’s degree at UCLA. She is currently assisting Dr. Leonard S. Marks’s prostate cancer research studies, which focus primarily on diagnosis, active surveillance, and treatment of low to intermediate risk prostate cancer.