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:…
ULTRASONOGRAPHY
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…
Bladder Calculi
KEY FACTS Terminology • Concretions of mineral salts/crystal within bladder lumen Imaging • Mobile avascular echogenic focus/foci in bladder with posterior acoustic shadowing on US • May see associated twinkling…
Scrotal Trauma
KEY FACTS Imaging • Heterogeneous testicular parenchyma or contour abnormality of testis in setting of scrotal trauma ○ Disruption of tunica albuginea very specific for testicular rupture • Extratesticular hematocele:…
Cystic Disease of Dialysis
KEY FACTS Terminology • Presence of 3 or more renal cysts per kidney in patients with chronic kidney disease (CKD) who do not have hereditary cystic disease • Occurs predominantly…
Renal Transplant Rejection
KEY FACTS Imaging • No specific imaging characteristics • Ultrasound-guided renal biopsy is gold standard • Acute rejection (AR): Nonspecific allograft edema, urothelial thickening • Resistive index (RI) may be…
