Radiology Key

GROSS ANATOMY Overview • Liver: Largest gland and largest internal organ (average weight: 1,500 g) ○ Functions – Processes all nutrients (except fats) absorbed from gastrointestinal (GI) tract; conveyed via…

KEY FACTS Terminology • Encapsulated collection of bile outside biliary tree Imaging • Ultrasound ○ Grayscale ultrasound – Focal collection of fluid within liver or close to biliary tree, or…

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…

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…

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…

KEY FACTS Terminology • Benign, congenital or developmental, fluid-filled space with wall derived from biliary endothelium Imaging • Anechoic lesion with posterior acoustic enhancement, well-defined back wall, and no internal…

KEY FACTS Terminology • Inflammation of liver due to viral infection or toxic agents Imaging • Acute: Enlarged liver • Chronic: Decrease in liver size • Grayscale ultrasound ○ Acute…

KEY FACTS Terminology • Benign malformations of biliary tract • Synonyms: von Meyenburg complex, bile duct hamartoma Imaging • Grayscale ultrasound ○ Numerous small, hypoechoic or hyperechoic foci uniformly distributed…