Cystic Lesions

Question 1

Intrahepatic masses

Answer 1

Cause the following findings:

• displacement of hepatic vascular radicles
• external buldgeing of the liver capsule
• posterior shift of the vena cava

Question 2

Extrahepatic mass

Answer 2

internal invagination or discontunity of the liver capsule

• formation of a triangular fat wedge
• anterioromedial shift of the IVC
• anterior displacement of the right kidney

Question 3

Hepatic cyst

Answer 3

solitary, non-paracystic cyst of the liver

Question 4

Cysts may be

Answer 4

Congenital or acquired, solitary or multiple

Question 5

symptoms of a cyst

Answer 5

Asymptomatic

Question 6

Benign cyst findings

Answer 6

well-demarcated, thin waled, anechoic with posterior enhancement

Question 7

what may develop as cyst increases

Answer 7

Pain

Question 8

if a cyst hemorrhages and becomes infected

Answer 8

Fever may occur

Question 9

hepatic cysts occur more commonly in what gender

Answer 9

females

Question 10

what do simple cysts infrequently contain

Answer 10

fine linear internal septa

Question 11

what may be seen within the cyst wall

Answer 11

Calcification, which may cause shadowing

Question 12

What is a congenital hepatic cyst

Answer 12

Usually incidental finding, solitary

Question 13

what does a congenital cyst arise from

Answer 13

Developmental defects in the formation of bile ducts

Question 14

how large may a congenital cyst be

Answer 14

tiny to as large as 20cm

Question 15

where is a congenital cyst usually found

Answer 15

anterior undersurface, right lobe most often

Question 16

Peribiliary cyst

Answer 16

often found in patients with severe biliary disease

Question 17

size of peribiliary cysts

Answer 17

0.2-2.5cm

Question 18

where are peribiliary cysts located

Answer 18

within porta hepatitis at junction of right and left hepatic ducts

Question 19

what might peribiliary cysts cause

Answer 19

Obstruction

Question 20

Polycystic Liver disease

Answer 20

Inherited disorder

Question 21

what is polycystic liver disease often in conjunction with

Answer 21

polycystic kidney disease

Question 22

size of cysts in polycystic liver disease

Answer 22

small, less than 2-3cm and multiple throughout the hepatic parenchyma

Question 23

what might occur near the porta hepatitis

Answer 23

May enlarge and cause obstrction

Question 24

in polycystic liver disease, what occurs to liver function tests

Answer 24

normal

Question 25

sonographic appearance of polycytsic liver disease

Answer 25

anechoic, well-defined borders with acoustic enhancement

Question 26

what is the differential diagnosis of polycystic liver disease

Answer 26

• Necrotic mets
• echinococcal cyst
• hematoma
• abscess
• hepatic cystadenocarcinoma