Professor Fred Witjes works at the urology department. He specializes in oncological urology, that is, cancer of the bladder, kidney, prostate, or testicle. As they have their own urological research lab, his research group can combine the performance of fundamental scientific research, clinical diagnostics, and several treatments, such as surgery, immunotherapy, and chemotherapies. This enables them to offer patients a wide range of treatments for cancer of the bladder, prostate, testicle, and kidney.