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37 Cards in this Set
- Front
- Back
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during what phase is liver tissue enhancement most prominent
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portal venous phase
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what are some examples of fibrous tissue that may occur in the liver
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cirrhosis
capsule Central scar Confluent fibrosis cholangiocarcinoma |
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when does fibrous tissue tend to enhance
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after a delay
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does hepatocellular carcinoma tend to have solitary or multiple lesions
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it depends if the patient cirrhosis than they will most likely have multiple nodules however if the patient does not have cirrhosis than HCC will likely be solitary
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what percent of a hccarcinoma has a capsule
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26%
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What signal intensity are HCC typicaly? What determines how bright they will be on T2? Do all HCC have change in SI on T2 or T1? what percent of hepatocellular carcinoma has a portion with high T-1 signal?
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increased SI on T2
No a lot of HCC have no change of SI at all and you will only pick them up on post contrast the more dysplastic the great the brighntess on T1 approximately 50% |
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what percent of patients that have cirrhosis will have a central star in their hepatocellular carcinoma lesion
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only 6%, however if the patient does not have cirrhosis there is a 50% chance they will have a central star
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what is the most common feature of hepatocellular carcinoma
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is well circumscribed
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what is a common type of hepatocellular carcinoma that occurs in non-cirrhotic patients
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fibrolamellar hepatocellular carcinoma
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what are some characteristics of fibrolamellar hepatocellular carcinoma
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it's rare, occurs in noncirrhotics, most of the time encapsulated, 50% of the time has a central star
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what are some liver lesions that may have a central star
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hepatic adenomas, hepatocellular carcinoma, focal nodular hyperplasia, large hemangiomas
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what are some examples of hypervascular metastasis
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carcinoid, islet cell tumors, pheochromocytoma, thyroid carcinoma, renal cell carcinoma, and possibly but not always breasts and melanoma
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what are some examples of cystic metastasis of the liver
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ovarian carcinoma, small cell lung carcinoma, choriocarcinoma, endometerial carcinoma, gastric carcinoma, sarcoma, GIST
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what is GIST more hypervascular before or after gleevac
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after
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what are some types of a hepatic metastasis that may become calcified
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mucinous adenocarcinoma;
ovarian, colon, rectum, stomach, breast |
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can a mucinous producing tumor be cold on pet
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yes
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what are some examples of lesions that will be hyperintense on T-1
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lesions that may contained fat such as hepatic adenomas, hepatocellular carcinoma. Also; melanoma, hemorrhagic tumors, ( hepatic adenomas, hepatocellular carcinoma, Mets) cyst with protein/hemorrhage
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what are some causes of the T2 lightbulb sign on MRI
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hemangioma, cyst, hypervascular meds, HCC but this one is rare
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what are some examples of ringed lesions of the liver
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hematoma, hepatocellular carcinoma, hepatic adenoma, metastasis, inflammatory cyst such as Candida
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what is the liver parenchyma made up of in diffuse liver disease of cirrhosis
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fat, fibrosis, regenerating nodules
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what are some causes of diffuse liver disease involving fat deposition
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obesity (NASH) hepatic toxins, diabetes, TPN, malnutrition
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what are some of the common locations of fat deposition in the liver
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periligamentous, pericholecystic, perihilar, sub capsular,
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what are some of the common locations of fat deposition in the liver
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periligamentous, pericholecystic, perihilar, sub capsular,
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why are some regions of the liver areas that commonly retain fat
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this is due to abberant venous drainage
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does the perihilar region always contain fat first
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no this could be a fat sparing area or an area of focal fat collection
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what are some causes of hepatic deposition of iron
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hemochromatosis, intravascular hemolysis, cirrhosis, or because of transfusions
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what are some of the consequences of iron overload
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cardiomyopathy, hepatocellular carcinoma and diabetes
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what happens to the liver when there is too much iron
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it becomes bright on CT
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what signal intensity is the liver on T2 \when there is iron deposition
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little signal intensity/dark
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what is a differential diagnosis for hyper attenuating lesions go in the liver
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iron deposition
chemotherapy glycogen storage disease amiodarone thorotrast arsenic poisoning |
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what is it called when this obstruction of the hepatic venules
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venocclusive disease no
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what are two locations where Budd-chiari disease tends to occur
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large hepatic veins and suprahe nopatic will inferior vena cava
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what are some of the common causes of bud Chiari syndrome
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idiopathic
birth-control trauma polycythemia vera |
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what are the perfusion patterns primary sclerosing cholangitis and bud chiari syndrome
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Central to peripheral
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what is the differential diagnosis of diffuse metastasis to the liver
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small cell carcinoma of the lung
melanoma breast carcinoma endocrine tumors |
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What enhances during the arterial phase in FNH
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the non- central scar portion
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What happens to the central scar during the delayed phase
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it enhances while the peripheral part of the lesion washes out and becomes isodense
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