Retrograde urethrography and voiding cystourethrography are the modalities of choice for imaging the urethra. Cross-sectional imaging modalities, including ultrasonography, magnetic resonance (MR) imaging, and computed tomography, are useful for evaluating periurethral structures. Retrograde urethrography is the primary imaging modality for evaluating traumatic injuries and inflammatory and stricture diseases of the male urethra. Sonourethrography plays an important role in the assessment of the thickness and length of bulbar urethral stricture. Although voiding cystourethrography is frequently used to evaluate urethral diverticula in women, MR imaging is highly sensitive in the demonstration of these entities. MR imaging is also accurate in the local staging of urethral tumors.

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High-frequency ultrasonography is the first modality of choice for the evaluation of scrotal pathology. The use of high-frequency ultrasound is increasing, allowing detection and better characterization of many benign intrascrotal lesions that can be treated with non-surgical management or testicular-sparing surgery.This pictorial essay presents gray-scale and color-flow Doppler features of non-neoplastic intratesticular masses. For ease of understanding, the review is organized into three major categories: cystic, vascular, and solid non-neoplastic masses. Table summarizes the key sonographic features, each with recommended management. Sonographic anatomy of the testisThe normal adult testes in each hemi scrotum are symmetric in size and measure approximately 5x3x2 cm. On ultrasound, a normal testis is identified by the presence of homogeneous, medium-level echoes and is contained by a fibrous sheath called the tunica albuginea. The tunica albuginea is identified on ultrasound as a thin echogenic line around the testis and is externally covered by the tunica vaginalis. The tunica vaginalis consists of visceral and parietal layers that are normally separated by a few milliliters (2-3 mL) of fluid. The tunica attaches to the scrotal wall at the posterolateral aspect of the testis. From the posterior aspect of the testis, the tunica albuginea invaginates within the testis to form an incomplete septum, called the mediastinum testis. Sonographically, the mediastinum testis appears as an echogenic band of variable thickness that extends across the testis in the longitudinal axis (Fig. 1). Multiple fibrous septa extend from the mediastinum into the testis, dividing it into 250 to 400 lobules. Spermatogenesis occurs within the seminiferous tubules contained within these lobules. The seminiferous tubules open into dilated spaces called the rete testis within the mediastinum via the tubuli recti. The normal rete testis can be seen on high-frequency US in 18% of patients. (1). The rete testis drains into the epididymis via 10 to 15 efferent ductules.There are four testicular appendages (remnants of the mesonephric and paramesonephric ducts): the appendix testis (hydatid of Morgagni), the appendix epididymis, the vas aberrans, and the paradidymis. The appendix testis and the appendix epididymis are commonly seen on scrotal US. The appendix testis is a small ovoid structure usually at the upper pole of the testis in the groove between the testis and the epididymis, better seen by the presence of fluid around the testis.The testes are supplied by testicular arteries that arise from the abdominal aorta. The testicular arteries enter the spermatic cord at the deep inguinal ring and continue along the posterior surface of the testis, penetrating the tunica albuginea and forming the capsular arteries that course through the tunica vasculosa, which underlies the tunica ABDOMINAL IMAGING PICTORIAL ESSAY Imaging of non-neoplastic intratesticular massesShweta Bhatt, Syed Zafar H. Jafri, Neil Wasserman, Vikram S. Dogra ABSTRACTThe u...