Liver

Question 1

Peripheral nodular arterial enhancement, central delayed/venous enhancement

Answer 1

Hepatic hemangioma

Question 2

Arterial enhancement with hypoattenuated central scar, delayed central scar enhancement

Answer 2

FNH

Question 3

Thin walled, fluid filled structure

Answer 3

Simple cyst

Question 4

Well-circumscribed and bright arterial enhancement, homogeneous on venous phase

Answer 4

Hepatic adenoma

Question 5

Hypointense lesion with and without contrast, peripheral arterial enhancement, delayed portal washout

Answer 5

Hepatic metastasis

Question 6

Heterogeneous, poorly circumscribed lesion with arterial enhancement and early washout

Answer 6

Hepatocellular carcinoma

Question 7

What hepatic metastatic lesions are brightly enhancing on arterial phase?

Answer 7

Thyroid carcinoma
Renal cell carcinoma
Neuroendocrine tumors

Question 8

MRI shows heterogeneous, poorly circumscribed liver lesion with arterial enhancement and early washout. What else is needed to make the diagnosis of HCC?

Answer 8

History of chronic liver disease at risk for cirrhosis

Question 9

Bleeding through Pringle maneuver during trauma?

Answer 9

Retrohepatic IVC injury or replaced hepatic artery

Question 10

Incidence of replaced right hepatic artery?

Answer 10

18% of population

Question 11

What is the origin of the replaced right hepatic artery?

Answer 11

SMA

Question 12

What is the course of the replaced right hepatic artery?

Answer 12

Posterior to the bile duct, lateral to the portal vein

Question 13

Incidence of replaced left hepatic artery?

Answer 13

11% of population

Question 14

What is the origin of the replaced left hepatic artery?

Answer 14

Left gastric artery

Question 15

What is the course of the replaced left hepatic artery?

Answer 15

Pars flaccida