Which marker is most specific for hepatocellular carcinoma among the following options?

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Multiple Choice

Which marker is most specific for hepatocellular carcinoma among the following options?

Explanation:
Alpha-fetoprotein is a serum marker classically linked to hepatocellular carcinoma. It is produced by fetal liver cells and is re-expressed in many HCC tumors, so an elevated AFP strongly supports liver-origin cancer, especially in the setting of liver disease. The other markers point to different tissues: CK7 and CK20 are cytokeratins used to help classify carcinomas by origin but don’t specifically indicate HCC, and hepatocellular carcinoma does not rely on a distinctive CK7/CK20 pattern. CA19-9 is more associated with pancreaticobiliary cancers, not HCC. So, AFP has the strongest association with hepatocellular carcinoma among these options.

Alpha-fetoprotein is a serum marker classically linked to hepatocellular carcinoma. It is produced by fetal liver cells and is re-expressed in many HCC tumors, so an elevated AFP strongly supports liver-origin cancer, especially in the setting of liver disease. The other markers point to different tissues: CK7 and CK20 are cytokeratins used to help classify carcinomas by origin but don’t specifically indicate HCC, and hepatocellular carcinoma does not rely on a distinctive CK7/CK20 pattern. CA19-9 is more associated with pancreaticobiliary cancers, not HCC. So, AFP has the strongest association with hepatocellular carcinoma among these options.

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