Liver Masses Flashcards
Mc malignant mass in liver
Mets
Multiplicity of lesions favors mets
Hepatic mets most commonly originate from
GI
Breast
Lung
Most characteristic feature of mets in post contrast CT and MR
Band like peripheral enhancement “target lesion”
Mc benign liver neoplasm
Cavernous hemangioma
Mcc liver mass
Mets
Well defined uniformly hyperechoic massin 80%
Benign
Cavernous hemangioma
Retain contrast on delayed images
Slow flow within the lesion
Cavernous hamangioma
Early and progressive contrast washout
HCC
Hypervascular mets
Cavernous hemangioma on ct
Discontinuous pattern of anhancement from the periphery of the lesion
Mc primary malignancy of the liver
Hepatocellular carcinoma
Hepatomas have major growth patterns
Solitary massive
Multinodular
Diffuse HCC
Classic and most common appearance of HCC on MR
Low signal on T1W1
High signal on T2W2
Arterial enhancement and venous washout
Essential imaging finding for radiologic diagnosis of HCC
Arterial phase enhancement
Homigenous for small lesions, heterogenous for large lesions
Normal or increased radionuclide activity on technetium sulfor colloid liver-spleen scan
Focal nodular hyperplasia
Because of kupffer cells
Mc in women on long term oral contraceptives
Benign taht carry risk of life threatening hemorrhage and potential for malignant degeneration
Hepatic adenoma
Benign solid mass consisting of abnormally arranged hepatocytes, bile ducts and kupffer cells
Focal nodular hyperplasia
Multiple adenomas >10
Liver adenomatosis
Hepatocellular malignancy
Large liver mass in adolescent or yound adult (23 yo mean age)
Without elevated AFP levels
Fibrolamellar carcinoma
Fibrolamellar carcinoma characteristics
Large, lobulated hepatic mass with central scar and calcifications
Charterisctic enhancing stellate central scar
Fibrolamellar hepatocellular carcinoma
Hereditary hemorrhagic telangiectasia
Osler-weber-rendu syndrome
Autosomal polycistic disease
Polycystic liver disease
Small benign neoplasms consisting of dilated cystic branching bile ducts
Bile duct hamartomas ( von metenburg complexes)
Rare cystic neoplasm of the biliary epithelium
Biliary cystadenoma
