Adenomatoid Tumor
KEY FACTS Terminology • Benign, solid paratesticular tumor of mesenchymal origin Imaging • Solid intrascrotal mass, usually extratesticular • Rounded or oval, well circumscribed, varying echogenicity • Size: 5 mm…
Bladder Diverticulum
KEY FACTS Terminology • Saccular outpouching from herniation of bladder mucosa and submucosa through muscular wall of bladder Imaging • Most commonly near ureterovesical junction • Anechoic outpouching from bladder…
Gonadal Stromal Tumors, Testis
KEY FACTS Terminology • Gonadal stromal tumors arise from nongerm cell elements Imaging • Leydig cell tumors ○ Small, solid, hypoechoic intratesticular mass ○ May occasionally show cystic change •…
Renal Transplant Pseudoaneurysm
KEY FACTS Terminology • Contained rupture secondary to defect in artery wall Imaging • Usually in renal parenchyma, rarely extrarenal • Usually ≤ 1 cm • Extrarenal pseudoaneurysm may be…
Penis and Urethra
IMAGING ANATOMY Penis • Composed of 3 cylindrical shafts ○ 2 corpora cavernosa : Main erectile bodies – On dorsal surface of penis – Diverge at root of penis (…
Peritoneal Cavity
TERMINOLOGY Definitions • Peritoneal cavity: Potential space in abdomen between visceral and parietal peritoneum, usually containing only small amount of peritoneal fluid (for lubrication) • Abdominal cavity: Not synonymous with…
Hydronephrosis
KEY FACTS Terminology • Dilation of renal collecting (pelvicalyceal) system ± ureteral dilation from intrinsic or extrinsic cause • Renal collecting system dilation, pelvicalyceal dilatation, pelvocaliectasis Imaging • Dilated intercommunicating…
Ureteral Ectopia
KEY FACTS Terminology • Strict definition: Ureter not inserting into bladder trigone • Common usage: Ureter terminating outside bladder Imaging • 70-80% have complete ureteral duplication, 5-17% bilateral • Intravesicular…
Horseshoe Kidney
KEY FACTS Terminology • Congenital anomaly in which kidneys are fused at their lower poles in midline Imaging • Kidneys on opposite sides with lower poles fused in midline ○…
