Dr. Stifelman is involved in many areas of research including molecular biology, biomedical engineering and clinical research. His focus in molecular biology has been in the development of tumor markers for prostate and kidney cancer. He was a co-investigator on several papers examining the role of RT-PCR of PSA for the clinical staging of prostate cancer and the use of enhanced RT-PCR assay for MN/CA9 to detect renal cell carcinoma cells in the peripheral blood. Publications of these works include Cancer and Cancer Research. In terms of biomedical engineering Dr. Stifelman has several patents for ureteral tissue expansion catheters which allow segments of ureter to be dilated over time. The increased ureteral surface area created by tissue expansion may be utilized to repair ureteral strictures, replace disease segments of the ureter, or potentially create an entirely new bladder. This pioneering work has led to several publications and an IRB approved clinical trial which is underway. Recently he has focused his efforts in developing a translational research program that can test new technologies that may be brought into the clinical arena. Currently being evaluated are different biosealants which may be used to perform a sutureless laparoscopic partial nephrectomy in an attempt to simplify this advanced complex procedure. As a clinical researcher Dr. Stifelman has published extensively on the role of laparoscopy and robotics in urology. He has created an extensive laparoscopic/robotic database which is being utilized to better define the role of these new minimally invasive techniques and technologies within urologic surgery. He has written book chapters on advanced laparoscopic and robotic procedures and has authored or co-authored over 50 scientific articles and abstracts on laparoscopic and robotic surgery. He has been presented his research, has taught post-graduate training courses and has been a visiting professor both nationally and internationally. Dr. Stifelman currently serves as a reviewer for the Journal of Urology, Urology and the Journal of Endourology.