Ariel Rischall, MD

Dr. Sameer Siddiqui treats all aspects of urology, including stone disease, incontinence, laser surgery for enlarged prostate, erectile dysfunction, blood in the urine, and elevated PSA. His fields of expertise are prostate cancer, bladder cancer, kidney cancer, and kidney reconstruction, subjects in which he has published extensively. Dr. Siddiqui is fellowship trained in robotic surgery, having completed over 1000 robotic cases. Dr. Siddiqui is one of the first surgeons in the Midwest to introduce a novel treatment option for prostate cancer called transurethral ablation of the prostate (TULSA - PRO). Dr. Siddiqui is Professor and Chair of the Department of Surgery, at Saint Louis University School of Medicine.

Jennifer Keller, MD is a highly skilled surgical oncologist based in St. Louis, MO. With a focus on complex procedures, Dr. Keller specializes in treating pancreatic cancer, small bowel cancer, gastric cancers, and more. She is known for her expertise in robotic and minimally invasive techniques, as well as her participation in multidisciplinary tumor boards to provide targeted treatment plans for her patients. Dr. Keller is also actively involved in research, exploring additional applications of cytoreductive surgery and hyperthermic intraperitoneal surgery, as well as geriatric oncology and community outreach.Generated from the website

Dr. Zachary Hamilton specializes in the surgical and medical treatment of urologic cancers, including kidney, testicular, prostate, penile, adrenal, and urothelial cancers. He performs procedures that include: radical and partial nephrectomy; cystectomy; neobladder; adrenalectomy; radical and partial penectomy; prostatectomy; and retroperitoneal lymph node dissection. He has extensive experience in robotic surgery and minimally invasive techniques. Dr. Hamilton is the division director and associate professor in the Department of Surgery, Division of Urologic Surgery, at Saint Louis University School of Medicine. He serves on multiple hospital and regional committees, including at the School of Medicine.