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Cellular Classification

Malignant tumors of the liver are primarily adenocarcinomas, with two major cell types: hepatocellular and cholangiocarcinoma.

Histologic classification is as follows:

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Appendiceal Carcinoids

Approximately 90% of appendiceal carcinoids measure smaller than 1 cm and are not located in the appendiceal base; these tumors can be consistently cured by appendectomy.[1] Appendiceal carcinoids larger than 2 cm require right-sided hemicolectomy and ileocecal lymphadenectomy because of the significant risk of metastasis.[1] For tumors measuring 1 to 2 cm, treatment is controversial, but hemicolectomy may be appropriate if there is invasion in the mesoappendix, if there is residual tumor in the...

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  • Hepatocellular carcinoma (liver cell carcinoma).
  • Hepatocellular carcinoma (fibrolamellar variant). The fibrolamellar variant is important because an increased proportion of these patients may be cured if the tumor can be resected. It is more frequent in young women. It also generally exhibits a slower clinical course than the more common hepatocellular carcinoma.
  • Cholangiocarcinoma (intrahepatic bile duct carcinoma).
  • Mixed hepatocellular cholangiocarcinoma.
  • Undifferentiated.

Hepatoblastoma rarely occurs in adults.

1

WebMD Public Information from the National Cancer Institute

Last Updated: October 07, 2011
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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