Trauma Etiology Urethral trauma may result from blunt, penetrating, or iatrogenic injury. The spectrum of urethral injuries includes contusion, partial or complete disruption, and urethral injury and may involve either the anterior or posterior urethral segment. Blunt anterior urethral injuries…
Urethral Diverticulum Etiology A urethral diverticulum is a focal outpouching of urethral tissue into the urethrovaginal space. It is thought to be due to postinflammatory dilatation and rupture of the periurethral glands (of Skene) into the urethra. Most urethral diverticula…
Benign Testicular Lesions Etiology and Clinical Presentation Benign scrotal or testicular swellings and masses have many etiologies and different clinical presentations, as listed in Tables 78-1 and 78-2 . Of palpable nodules, 31% to 47% are benign at surgery. TABLE…
Technical Aspects Scrotal imaging has been one of the undeniable success stories of modern radiology. The scrotum is predominantly imaged for two clinical indications: the painless scrotal mass and the acute scrotum. Both conditions predominantly affect young men in the…
Etiology Penile lesions can be categorized by cause ( Box 76-1 ). Box 76-1 From Bhatt S, Kocakoc E, Rubens DJ, et al: Sonographic evaluation of penile trauma. J Ultrasound Med 2005; 24:993–1000. Penile Pathologic Processes Trauma Blunt trauma Penetrating or…
Etiology Erectile dysfunction manifests clinically most commonly as impotence and less commonly as priapism. The causes of impotence can be psychogenic, endocrinologic, neurogenic, anatomic, infectious, pharmacologic, or vasogenic. Vasogenic causes of erectile dysfunction include venous leak (aging, priapism, congenital, idiopathic)…
Imaging Traditionally, the seminal vesicles were evaluated with seminal vesiculography. This has largely been replaced by computed tomography (CT), magnetic resonance imaging (MRI), and ultrasound ( Figure 74-1 ). Computed Tomography The seminal vesicles are of soft tissue attenuation (…
Benign Focal Prostate Lesions Etiology Benign focal lesions of the prostate include benign prostatic hyperplasia (BPH) (see Chapter 72 ), congenital cysts, acquired cysts, prostatitis (acute bacterial, chronic bacterial, chronic pelvic pain syndrome [inflammatory and noninflammatory], and asymptomatic prostatitis), prostatic…
Etiology Benign prostatic hyperplasia (BPH) is characterized by the increased volume of prostatic stroma and glandular epithelial cells involving the transitional zone and periurethral region of the prostate. Hormones such as androgens (testosterone and dihydrotestosterone [DHT]) and estrogens are thought…
Etiology Adrenal masses may be neoplastic, infectious, or hemorrhagic ( Box 71-1 ). Neoplasia is the most common cause for an adrenal mass seen on imaging. An incidentally detected adrenal mass as well as an adrenal mass in a patient…