This issue of MRI Clinics of North America focuses on MR Imaging of the Genitourinary System, and is edited by Dr. Ersan Altun. Articles will include: Future Perspectives in Multiparametric Prostate MR Imaging; MRI-Guided Focal Therapies of Prostate Cancer; Infectious and Inflammatory Diseases of the Urinary Tract: Role of MRI; MRI of the Perirenal Space and Retroperitoneum; Tumors of Renal Collecting Systems, Renal Pelvis and Ureters: Role of MRI and MR Urography versus CT Urography; Radiomics of Kidney Cancer; MRI of the Bladder Tumors - What Is the Incremental value of PET-MRI?; MRI of the Penis and Urethra; MRI of the Testicular and Extratesticular Tumors: When Do We Need?; MRI Evaluation of Kidneys in Patients with Renal Impairment: Non-Contrast Techniques versus Contrast-Enhanced Techniques; Classification and Diagnosis of Cystic Renal Tumors: Role of MRI versus Contrast-Enhanced Ultrasound; and more!