Hepatobiliary Flashcards
Peritoneal Calcification: Causes
● Dialysis
● Prior peritonitis
● Ovarian cancer
● Tuberculosis
● Extravasated barium
● Post surgical heterotopic calcification
Cholangiocarcinoma: Classification
● Intrahepatic (peripheral)
● Perihilar
● Extrahepatic
Hypervascular Liver Lesions on Arterial phase
- Hepatoma
- Metastatic islet cell tumors
- Metastatic renal cell carcinoma
- FNH
- Hepatic adenoma
- Hemangioma
- AVM /aneurysm /pseudoaneurysm
Budd-Chiari Syndrome: CT findings
Budd-Chiari Syndrome: CT Findings
– Acute phase
- Early enhancement of caudate lobe and central portion of liver around IVC, with decreased enhancement of the rest of the liver
- Delayed enhancement of peripheral portions of liver and central portion of low density (called flip-flop appearance)
- Narrow hypodense hepatic veins and IVC with dense walls
– Chronic phase
- Non visualization of IVC and hepatic veins
- Hyperdense nodules or regenerating nodules
Budd-Chiari Syndrome: Causes
- Primary- membranous obstruction of hepatic venous outflow tract
- Secondary- due to thrombosis due to causes ranging from chemotherapy or radiation therapy, hypercoagability states, or hepatic or extra-hepatic tumors
Radiological signs of Cirrhosis
Surface retraction
Atrophy of Right lobe and medial segments (5, 6, 4A, 4B)
Caudate lobe lateral segment hypertrophy
Anterolateral flattening
Nodular contour
Widened periportal space and gallbladder fossa
Prominent fissures
Right posterior hepatic notch
Differentials for cystic hepatic lesions
● Developmental
● Inflammatory
● Neoplastic
● Trauma related
● Developmental
● Hepatic cysts
● Biliary hamartoma
● Polycystic liver disease
● Caroli disease
● Ciliated hepatic foregut duplication cyst
● Inflammatory
● Pyogenic liver abscess
● Amebic liver abscess
● Hydatid cyst
● Fungal microabscesses
● Neoplastic
● Biliary cystadenoma/cystadenocarcinoma
● Cystic liver metastases
● Cystic hepatocellular carcinoma
Cystic cholangiocarcinoma
● Trauma related
● Hematoma
● Biloma
● Seroma
