Simple Renal Cyst
KEY FACTS Terminology • Benign, fluid-filled, nonneoplastic renal lesion Imaging • Ultrasound is ideal for characterizing simple or complex renal cysts in nonobese patients • Unilocular, thin-walled, round/oval renal lesion…
ULTRASONOGRAPHY
Testicular Germ Cell Tumors
KEY FACTS Imaging • Discrete, solid, intratesticular mass on grayscale ultrasound with abnormal intrinsic vessels on color Doppler • Most common neoplasm in males aged 15-34 • Mostly unilateral; contralateral…
Pancreatic Neuroendocrine Tumor
KEY FACTS Terminology • Historically known as islet cell or carcinoid tumors Imaging • Variable: Range from < 1 cm to > 20 cm; typically 1-5 cm • Small tumors:…
Testes and Scrotum
GROSS ANATOMY Testes • Densely packed seminiferous tubules separated by thin, fibrous septa • Seminiferous tubules join to form rete testis , which converge posteriorly into efferent ductules ○ Penetrate…
Acute Pancreatitis
KEY FACTS Terminology • Acute inflammatory process of pancreas with variable involvement of other local tissues and remote organs ○ Interstitial edematous pancreatitis, necrotizing pancreatitis ○ Acute pancreatic fluid collection…
Spermatocele/Epididymal Cyst
KEY FACTS Terminology • Spermatocele: Retention cyst of rete testis or epididymis containing nonviable spermatozoa • Epididymal head cyst: Collection of simple fluid Imaging • Spermatoceles may contain linear septations…
Epiploic Appendagitis
KEY FACTS Terminology • Ischemic infarction of epiploic appendages (small pouches filled with fat, located along colon) Imaging • Noncompressible, hyperechoic oval mass, adjacent to colon, deep to region of…
Abdominal Wall
TERMINOLOGY Definitions • Abdomen: Region between diaphragm and pelvis GROSS ANATOMY Anatomic Boundaries of Anterior Abdominal Wall • Superiorly: Xiphoid process and costal cartilages of 7th-10th ribs • Inferiorly: Iliac…
Appendiceal Mucocele
KEY FACTS Terminology • Distension of appendiceal lumen as result of mucin accumulation from epithelial proliferation or obstruction Imaging • Distended tubular or pear-shaped cystic structure in right lower quadrant…
