Dr. Joel Sheinfeld, MD is a board-certified urologic surgeon who specializes in surgery for patients with genitourinary cancers, and the Deputy Chief of the Urology Service; William G. Cahan Chair in Surgery, Memorial Sloan-Kettering Cancer Center. He completed Medical School at the University of Florida, College of Medicine, in Gainsville, FL, his Residency in Urology at Strong Memorial Hospital in Rochester, NY, and continued his Fellowship in Urologic Oncology at Memorial Sloan-Kettering Cancer Center, NY, NY. His expertise is in the clinical care and surgical treatment of patients with testicular cancer. Dr. Sheinfeld works closely with colleagues from medical oncology, pathology, radiology, and radiation therapy to provide the most effective treatment for our patients, as well as to establish the optimal multidisciplinary approach for all patients with testicular cancer. Dr. Sheinfeld has developed surgical techniques to preserve patients’ fertility through the use of “nerve sparing” retroperitoneal lymph node dissection (RPLND). This approach is appropriate for most patients who have low-stage disease and for many patients with more-advanced cancers who have completed treatment with chemotherapy. For the past decade he has performed approximately 100 RPLNDs per year. Because of his particular expertise in retroperitoneal surgery, he also works with specialists in other disciplines to surgically manage different types of tumors in the retroperitoneum. Dr. Sheinfeld has written numerous articles and book chapters on testicular cancer care and frequently speak on the topic at national and international forums. As an established leader in testicular cancer he has edited special editions on this disease in Urologic Clinics of North America, theWorld Journal of Urology, the British Journal of Urology, Urologic Oncology, and Seminars in Urologic Oncology. Furthermore, he has written or co-authored the chapter on the surgical management of testicular cancer for the major textbooks in urology (Campbell’s Urology, 8th, 9th, and 10th editions) and oncology (DeVita’s Principles and Practice of Oncology, 5th, 6th, 7th, 8th, and 9th editions). Dr. Sheinfeld serves as faculty director for the course on testicular cancer for the American Urological Association and is a member of the National Comprehensive Cancer Network’s guidelines committee for testicular cancer and kidney cancer. He is an associate editor of Urology and World Journal of Urology and a reviewer for numerous peer-reviewed journals and an active member of the American Association of Urology and the Society of Urologic Oncology (of which he is a former board member). Dr. Sheinfeld also hold an appointment as Professor in the Department of Urology at Weill Cornell Medical College and Adjunct Professor at SUNY Downstate Medical Center.