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…
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 This has largely been replaced by computed tomography (CT), magnetic resonance imaging (MRI), and ultrasound ( Figure 74-1 ). Figure…
Peritoneal Fluid Collections Etiology Ascites is the abnormal accumulation of fluid in the peritoneal cavity. There are numerous causes of ascites, including congenital, infective, inflammatory, and neoplastic diseases. In the…
Lymph Node Imaging Techniques Imaging evaluation of lymph nodes forms an integral component of staging of various malignancies, including lymphomas, and is also helpful in the evaluation of certain infective…
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…
General Considerations Diffuse involvement of the pancreas can occur with various inflammatory, infective, infiltrative, or neoplastic disorders. Any pathologic process that involves the pancreas focally also can cause diffuse involvement…
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…
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…
Monitoring the response of tumors to treatment has become an integral component of oncologic imaging. Imaging studies play a vital role in objective assessment by quantifying tumor response to a…
This chapter discusses benign and malignant renal lesions ( Box 63-1 ) with a separate note on cystic lesions based on the Bosniak classification. Box 63-1 Benign and Malignant Focal…
