How Hepatitis B Patients Can Prevent Cirrhosis and Liver Cancer

China is a country with a large hepatitis B burden and ranks first globally in liver-cancer incidence. Liver-cancer mortality is second among malignancies in China (after lung cancer), and worldwide it is the third most fatal malignancy.

Four risk factors have been confirmed as the leading risks for hepatocellular carcinoma, and they usually act synergistically in liver carcinogenesis: viral hepatitis, ethanol (alcohol), metabolic disease, and environmental pollution.

Viral hepatitis mainly includes hepatitis B and C. Among Asian populations, hepatitis B virus is the primary liver-cancer carcinogen; among Western populations it is hepatitis C. Hepatitis B virus is a DNA virus that can disrupt host genes regulating oncogenes through insertional mutagenesis; the host immune response to chronic inflammation can damage anti-cancer genes such as P53. Most Chinese liver-cancer patients therefore progress from hepatitis B.

Ethanol is another important liver-cancer carcinogen; it is directly toxic to hepatocytes. Long-term and excessive drinkers mostly develop "alcoholic liver." Drinkers are especially prone to cirrhosis, which then progresses to liver cancer. Moreover, liver-cancer patients with alcoholic cirrhosis are harder to treat than those without cirrhosis, with fewer surgical options and a poorer prognosis.

NASH (metabolic-associated fatty liver disease, commonly called fatty liver) induced by metabolic disease is also an independent risk factor for liver cancer. Even without hepatitis B, alcoholic and fatty liver can progress to liver cancer. Morbid obesity (especially abdominal obesity) and diabetes are the main drivers of non-alcoholic steatohepatitis.

Environmental and food pollution are also important liver-cancer carcinogens. Aflatoxin in moldy food causes glycine (G) at codon 249 to be replaced by threonine (T), damaging the P53 tumor-suppressor gene and ultimately causing cancer. Arecoline in betel nut, popular in Hunan and Guangxi, is also a carcinogen that damages hepatocytes. In addition, water in many Chinese rural areas is contaminated by a cyanobacterial hepatotoxin, microcystin, which can also induce hepatocellular carcinoma. Schistosomiasis also causes cirrhosis and liver cancer. Coastal riverside residents who eat seafood long-term are prone to liver cancer from algal-toxin pollution; China's four high-incidence areas—Qidong (Jiangsu), Tong'an (Fujian), Fushui (Guangxi) and Shunde (Guangdong)—are all coastal riverside regions.

In addition, overwork, staying up late, eating pickled, fried, grilled and roasted foods, smoking, trace-element deficiency or excess (low selenium, molybdenum, manganese, zinc; high iron, nickel, arsenic), and genetic factors also bear some relation to liver carcinogenesis.

Many hepatocellular carcinomas are not caused by a single factor. Patients often carry hepatitis virus and drink, and through irregular schedules, binge eating, or excessive meat and sugar (high-calorie foods) become obese with too much abdominal fat. Over time they inevitably develop alcoholic liver, fatty liver, cirrhosis and liver cancer, and some also develop type-2 diabetes.

So hepatitis B patients who want to prevent cirrhosis and liver cancer must, on one hand, actively treat hepatitis B, and on the other, eat lightly, attend to food safety, exercise moderately, control weight (especially abdominal fat), and maintain regular作息.

Generally, hepatitis B carriers cannot be completely cured (though a few are cured, even spontaneously through their own immunity). Regular checks of alpha-fetoprotein (AFP), liver function, and HBV viral load help patients detect signs of liver carcinogenesis early. These markers should be checked every six months.

Patients should also regularly undergo liver ultrasound or MRI, CT, or contrast-enhanced CT. Ultrasound is the most economical but misses small early lesions (such as in situ liver cancer) and depends on the operator's skill. MRI and CT are more precise but more expensive.

The liver is the body's second most important organ; once cirrhosis or liver cancer develops, life is directly threatened. Early cirrhosis and liver cancer have no obvious symptoms; by the time symptoms appear, disease is usually mid- or late-stage. Regular checks are therefore crucial for hepatitis B patients.

Mid- and late-stage cirrhosis and liver-cancer patients mainly present with: upper abdominal pain/discomfort, poor appetite, aversion to greasy food, weight loss, fatigue, spider angiomas, pruritus, flaky skin, abdominal mass, fever, jaundice, ascites, lower-extremity edema, gastrointestinal bleeding, right shoulder pain, diarrhea or constipation.

Liver cancer most often metastasizes to lung and bone. Patients with lung metastases also develop cough, hemoptysis, shoulder pain, chest tightness and chest pain; bone metastases cause generalized aching and continuous pain at metastatic sites. Most liver-cancer patients have a wiry pulse and a bitter taste in the mouth, corresponding to TCM's shaoyang pattern.

Relying on symptoms and TCM pulse diagnosis to diagnose liver cancer is dangerous; hepatitis B patients should rely on regular checks rather than self-judgment or pulse-taking to track progression. The ideal is to keep HBV DNA below the lowest detection level, with normal liver function and AFP. High viral load requires antiviral drugs; abnormal liver function requires liver-protective medication. The liver is the body's key detoxifying organ and is easily damaged by drugs; liver medication must be guided by an experienced physician, not self-prescribed.