PAEA Surgery End Of Rotation (EOR) Practice Exam

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What percentage of liver tumors are classified as malignant?

  1. 50%

  2. 75%

  3. 90%

  4. 95%

The correct answer is: 95%

The classification of liver tumors is essential in understanding their behavior and treatment options. It is noted that a significant majority of liver tumors are indeed malignant, with approximately 90-95% classified as such. The most common type of malignant liver tumor is hepatocellular carcinoma (HCC), which is primarily linked to chronic liver diseases, such as cirrhosis and hepatitis B or C infections. This high percentage reflects the prevalence of serious underlying liver conditions that contribute to cancer development. While there are benign liver tumors, such as hemangiomas and adenomas, they represent a much smaller fraction of liver tumors overall. Consequently, the statement that 95% of liver tumors are malignant aligns with epidemiological data regarding the incidence and classification of liver tumors.