Primary Liver Cancers, Part 2: Progression Pathways and Carcinogenesis

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Hepatocellular carcinoma (HCC) and primary intrahepatic cholangiocarcinoma (ICC) incidence is rising globally, posing significant mortality.
• Understanding the molecular pathogenesis is crucial for developing targeted therapies.

Purpose of the Study:

• To review current literature on the etiologies and molecular alterations in HCC and ICC.
• To identify key genetic drivers and risk factors for these liver cancers.

Main Methods:

• A comprehensive literature review was performed.
• Articles focusing on the etiology and molecular pathogenesis of HCC and ICC were identified and analyzed.

Main Results:

• Chronic inflammation is a primary etiological risk factor for both HCC and ICC.
• Key genetic alterations in HCC include mutations in CTNBB1 and P53.
• Primary genetic alterations in ICC involve IDH1/2, KRAS, NRAS, and P53.
• The mutational landscape for both cancers is influenced by their specific underlying etiologies.

Conclusions:

• Etiology significantly impacts the molecular landscape of HCC and ICC.
• Identifying these etiological and genetic factors is vital for understanding liver carcinogenesis.