This issue of Ultrasound Clinics features a review of genitourinary topics and includes the following articles: Characterization of Renal Masses by Ultrasound; Renal Malignant Masses as Characterized by Ultrasound Contrast; US Elastography of Kidney; Prostate Biopsies and Controversies; Post-vasectomy Complications; Acute Scrotum; Testicular trauma- Role of Sonography; Testicular Elastography; Contrast Enhance Ultrasound of the testes; and Vascular Complications of Renal Transplant.