Peribiliary Cyst
KEY FACTS Terminology • Cystic dilatation of obstructed periductal glands of bile ducts • Retention cyst of peribiliary gland Imaging • Well-defined, cystic structures adjacent to portal triads • Usually…
ULTRASONOGRAPHY
Hepatic Microabscesses
KEY FACTS Terminology • Typically refers to hepatic Candida abscesses in immunocompromised patients Imaging • Multiple small, hypoechoic lesions throughout liver (most common pattern) • Target sign (hyperechoic center with…
Pyogenic Hepatic Abscess
KEY FACTS Terminology • Localized collection of pus in liver due to bacterial infectious process with destruction of hepatic parenchyma and stroma Imaging • Cluster sign: Cluster of small pyogenic…
Hepatic Cavernous Hemangioma
KEY FACTS Terminology • Benign tumor composed of dilated vascular channels lined by single layer of endothelial cells and supported by thin, fibrous stroma Imaging • Typical hemangioma: Well-defined, uniformly…
Sinusoidal Obstruction Syndrome (Venoocclusive Disease)
KEY FACTS Terminology • Hepatic venous outflow obstruction due to occlusion of terminal hepatic venules and sinusoids • Synonym: Hepatic sinusoidal obstruction syndrome Imaging • Hepatosplenomegaly, ascites, gallbladder wall thickening…
Hepatic Cirrhosis
KEY FACTS Terminology • Common end response of liver to variety of insults, injuries, regeneration, and progressive fibrosis Imaging • Nodular contour, coarse or heterogeneous echotexture ± hypoechoic nodules • General…
Biliary Cystadenoma/Carcinoma
KEY FACTS Terminology • Rare premalignant or malignant, unilocular or multilocular cystic tumor arising from biliary epithelium • Synonyms: Hepatobiliary cystadenoma/carcinoma, biliary cystic tumor, biliary cystic neoplasm, mucinous cystic neoplasm…
Hepatic Steatosis
KEY FACTS Terminology • Accumulation of triglycerides within hepatocytes Imaging • Diffuse hepatic steatosis ○ Increased echogenicity: Liver more echogenic than kidney ○ Attenuation of US beam results in poor…
