This unique reference guide to scrotal ultrasonography draws on the accumulated expertise of the Experimental Medicine Department at "Sapienza" University, where the andrological ultrasonography unit has performed over 10,000 testicular ultrasound examinations for various conditions and explored experimental new imaging techniques. This core experience has been enriched by insightful contributions from several international experts to form one of the most comprehensive collections of ultrasound images, many in full color, of scrotal pathology in the world.