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…
Pancreatic Pseudocyst
KEY FACTS Terminology • Collection of pancreatic fluid and inflammatory exudate encapsulated by nonepithelial fibrous tissue developing > 4 weeks after acute pancreatic fluid collection Imaging • 2/3 are peripancreatic:…
Ureteropelvic Junction Obstruction
KEY FACTS Terminology • Also known as pelviureteric junction obstruction • Obstruction of urine flow at level of UPJ • Congenital or acquired Imaging • Marked hydronephrosis to level of…
Varicocele
KEY FACTS Terminology • Dilatation of pampiniform plexus > 2-3 mm due to congestion and retrograde flow in internal spermatic vein Imaging • Dilated serpiginous veins at superior pole of…
Epidermoid Cyst
KEY FACTS Terminology • Rare, benign, keratin-containing lesion of controversial origin Imaging • High-resolution ultrasound (≥ 10 MHz) is imaging modality of choice • Grayscale ultrasound ○ Characteristic onion skin,…
Multilocular Cystic Nephroma
KEY FACTS Terminology • Rare, nonhereditary, benign cystic renal neoplasm containing epithelial and stromal components • a.k.a. cystic nephroma, multilocular cystic renal tumor, cystic hamartoma Imaging • Multiloculated cystic renal…
Intraductal Papillary Mucinous Neoplasm (IPMN)
KEY FACTS Terminology • Intraductal papillary mucinous neoplasm: Mucin-producing cystic tumor arising from main &/or branch pancreatic ducts with low malignant potential • Previously called: Intraductal papillary mucinous tumor, duct…
