Chapter 2: Understanding Liver Cancer and Its Risk Factors
The liver performs essential functions, including processing nutrients, producing bile, storing energy, and helping remove certain substances from the blood. Because it carries out so many important tasks, diseases affecting this organ can have widespread effects on the body.
The most common primary liver cancer in adults is hepatocellular carcinoma, which develops from liver cells called hepatocytes. It is frequently associated with chronic liver disease, particularly cirrhosis, although it can also occur in people without established cirrhosis.
One major risk factor is chronic hepatitis B infection. Hepatitis B can contribute to liver cancer even in some people who have not developed cirrhosis. Chronic hepatitis C infection is another important risk factor, especially when it leads to advanced liver scarring.
Other contributors include cirrhosis from different causes, long-term heavy alcohol consumption, metabolic dysfunction-associated steatotic liver disease, certain inherited disorders, and exposure to aflatoxins produced by particular molds that can contaminate improperly stored crops and nuts.
Age, family history, and individual biological differences can also influence risk.
Importantly, having a risk factor does not mean someone will develop liver cancer, and people without obvious risk factors can still receive the diagnosis. Cancer usually develops through multiple biological changes rather than one simple cause.
Image 1: A medical illustration of the liver and surrounding abdominal organs.
Doctors may use blood tests, imaging studies, and, in selected cases, a biopsy to investigate a suspected liver tumor. The appropriate tests depend on the patient's medical history, examination findings, and imaging results.
Understanding these risk factors can help people discuss prevention and screening with their healthcare professionals. For individuals at elevated risk, appropriate monitoring may allow liver cancer to be detected earlier, when more treatment options may be available.