Abstract
There are some difficulties associated with performing ultrasonography of the external genital organs, such as hesitancy. Moreover, ultrasonography of the external genital organs is not routinely done in health screening. Therefore, opportunities to perform ultrasonography of the external genital organs are limited for ultrasonographers, and even for urologists. A logical understanding of pathologies of the external genital organs and careful comparison between the affected and unaffected side are helpful to overcome these problems. In this article, ultrasonography of the external genital organs is reviewed, with intrascrotal swelling, acute scrotum, and other abnormalities discussed. Schema for easy understanding of each pathology and typical images are presented, including benign cystic lesions of the scrotum, testicular tumors, testicular torsion, impalpable testis, and testicular trauma.