Page 1 of 1: Hepatomas usually visualize during the

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Hepatomas usually visualize during the arterial blood flow phase before normal liver parenchyma because?

Hepatomas often cause shunting of blood, increasing velocity of blood flow through tumor
Liver tumors are usually supplied by the hepatic artery, not the portal circulation like the rest of the liver
Liver tumors commonly block venous drainage of the normal liver parenchyma
Necrotic areas in tumors typically have increased vascularization

guest · Credits: 77491 My Scrapbook My Reading List 262569 Books

A distinctive feature of the liver is its unique dual blood supply, which comes from the hepatic artery (25% of vascularization) and the portal vein (75% of vascularization). This characteristic is useful for detecting tumors that are usually hypervascular, such as hepatocellular carcinoma, hemangioma, focal nodular hyperplasia, and hepatic adenoma, as well as metastases from neuroendocrine tumors (islet cell, carcinoid), renal cell carcinoma, and breast carcinoma. These tumors receive arterial blood primarily and are better detected during the hepatic arterial phase of helical computed tomography because they demonstrate greater enhancement than the normal hepatic parenchyma, which has a predominantly venous supply. In contrast, during the portal venous phase, these tumors sometimes enhance to a degree similar to that of the hepatic parenchyma and may escape detection

naseem · Credits: 1447 My Scrapbook

nice work.

BRAVO · Credits: 45290 My Scrapbook

answer is liver tumors are usually supplied by the hepatic artery, not the portal circulation like the rest of the liver ,right!!!

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