Hepatic neoplasm, commonly known as liver cancer, is a serious condition where abnormal cells grow out of control in the liver, one of the body’s most vital organs. While the liver quietly performs hundreds of essential functions every day, from filtering toxins to helping digest food, it can become vulnerable to diseases that often go unnoticed until they reach advanced stages. Understanding this condition, its causes, and ways to reduce risk can help people take steps to protect their liver health.

Understanding Hepatic Neoplasms

A neoplasm is simply a medical term for an abnormal growth of tissue, which can be either benign (non-cancerous) or malignant (cancerous). When we talk about hepatic neoplasms, we’re referring to tumors that develop in the liver. Primary liver cancer means the cancer starts in the liver itself, rather than spreading from another part of the body.^[1]

The liver is a football-sized organ located in the upper right side of your abdomen, just below your ribs. It performs over 500 known functions that keep you alive. Among its most important jobs are filtering harmful substances from your blood, producing bile to help digest fats, storing energy in the form of sugar, and balancing the chemicals in your blood. Because no one can live without their liver, understanding diseases that affect it becomes critically important.^[1]

Primary liver neoplasms are composed of cells that normally exist in the liver. The most common type is hepatocellular carcinoma, where tumor cells resemble the liver’s main cells called hepatocytes. The second most common type is cholangiocarcinoma, which develops from the bile duct cells inside the liver. There are also very rare types like angiosarcoma, which begins in the blood vessel linings within the liver, and hepatoblastoma, which mainly affects young children.^[2]

It’s important to understand that metastases—cancers that spread to the liver from other organs like the colon, breast, or lungs—are actually far more common than primary liver cancer. In people without underlying liver disease, metastatic tumors outnumber primary liver cancers by as much as 30 to 1. However, in people with cirrhosis (severe scarring of the liver), primary liver cancer becomes more common and actually outnumbers metastases by more than 3 to 1.^[2]

How Common Are Hepatic Neoplasms

Hepatocellular carcinoma, the most common form of primary liver cancer, represents more than 90% of all primary liver tumors. It is now the fifth most common cancer worldwide among men and the eighth most common among women. Globally, it ranks as the third leading cause of cancer-related deaths, highlighting just how serious this disease can be.^[5]

The occurrence of liver cancer varies dramatically across different parts of the world. East Asia and sub-Saharan Africa have the highest rates, where liver cancer ranks among the leading causes of death. In these high-incidence areas, chronic hepatitis B infection is extremely common and drives most cases. In contrast, the United States has historically had lower rates, with liver cancer accounting for about 2.3% of cancer deaths and an annual incidence of approximately 4.1 per 100,000 people.^[2]

However, the incidence of liver cancer in the United States has been rising significantly. Between 1975 and 1998, cases more than doubled, and this upward trend has continued. Each year, about 24,500 men and 10,000 women are diagnosed with liver cancer in the United States. Liver cancer is two to three times more common in men than women, and most people diagnosed are 60 years old or older.^[1][17]

The overall five-year survival rate for patients with liver cancer is approximately 17-18%, making it one of the deadliest cancers. The survival rate is second only to pancreatic cancer in terms of poor outcomes. However, when caught early and treated promptly, the five-year survival rate can be as high as 31%. Unfortunately, less than half of patients are diagnosed at an early stage when treatment is most effective. For those with regional disease (cancer that has spread to nearby areas), survival drops to 11%, and for metastatic disease (cancer that has spread to distant organs), it falls to just 3%.^[5][3]

What Causes Hepatic Neoplasms

Liver cancer happens when something damages the DNA inside healthy liver cells. Our DNA contains genes that tell cells when to grow, multiply, and die. We have specific genes called oncogenes that help cells grow and divide, and tumor suppressor genes that keep cells from multiplying out of control and ensure they die when they’re supposed to. When DNA becomes damaged or mutates, cells receive incorrect instructions, which can lead to uncontrolled growth and cancer.^[4]

The most significant causes of liver cancer are chronic viral hepatitis infections, particularly hepatitis B and hepatitis C. These two viruses together account for more than 70% of all hepatocellular carcinoma cases worldwide. Hepatitis B virus alone is responsible for about 56% of cases, while hepatitis C accounts for about 20%.^[5]

Hepatitis B virus is an enveloped virus with a circular DNA genome. It affects more than 250 million people worldwide and is the most common cause of chronic hepatitis globally. The way hepatitis B leads to cancer is particularly concerning: the virus’s genetic material actually integrates into the human genome. This insertion often occurs at specific sites, such as the promoter region of a gene called telomerase reverse transcriptase, causing mutations that can account for 60% of liver cancer cases. The virus can also cause mutations in other important genes that control cell growth and DNA repair.^[5]

What makes hepatitis B especially dangerous is that it can cause liver cancer even in people who don’t have cirrhosis, though more than 80% of hepatitis B-related liver cancer cases do occur in people with underlying cirrhosis. Having high levels of hepatitis B virus DNA in the blood (10,000 copies per milliliter or more) is a strong predictor of developing liver cancer, regardless of other factors.^[5]

Hepatitis C virus is another major cause of liver cancer. Unlike hepatitis B, there is currently no vaccine to prevent hepatitis C infection, though effective antiviral treatments exist that can cure the infection and appear to reduce the risk of developing liver cancer. The hepatitis C virus spreads through contact with infected blood, which is why people who have used injected drugs and shared needles are at higher risk.^[7]

Cirrhosis of the liver is present in 80-90% of people diagnosed with hepatocellular carcinoma. Cirrhosis means the liver has become severely scarred due to long-term damage. This scarring can result from many causes, including viral hepatitis, excessive alcohol consumption, or metabolic conditions. As the liver attempts to repair and replace damaged tissue over and over again, there’s an increased chance of errors occurring during DNA replication, which can lead to cancer. The annual incidence of liver cancer in people with cirrhosis ranges from 2-4%.^[5][1]

Other important causes include alcohol-related cirrhosis, which develops from long-term heavy drinking. The liver has difficulty processing alcohol, and consuming too much over many years can lead to scarring and eventually cancer. Obesity and diabetes also contribute to liver cancer risk, often through a condition called metabolic dysfunction-associated steatotic liver disease (formerly known as nonalcoholic fatty liver disease), where excess fat builds up in the liver even without alcohol consumption.^[1]

Risk Factors for Developing Hepatic Neoplasms

Certain groups of people face higher risks of developing liver cancer based on medical conditions, behaviors, and other factors. The most significant risk factor is having chronic infection with hepatitis B or hepatitis C virus. People with these infections should work closely with their healthcare providers to manage the infection and monitor for early signs of liver problems.^[7]

Having cirrhosis is another major risk factor. Cirrhosis can develop from many causes, including viral hepatitis, alcohol use disorder, metabolic dysfunction-associated steatotic liver disease, or inherited conditions. Anyone diagnosed with cirrhosis should receive regular screening for liver cancer every six months, as the risk is significantly elevated.^[17]

Excessive alcohol consumption over many years damages the liver and increases cancer risk. Heavy drinking is defined as consuming alcohol well above recommended levels consistently over time. The liver struggles to process alcohol, and chronic exposure leads to inflammation, scarring, and eventually cancer in some people.^[4]

Being overweight or having obesity increases the risk of developing fatty liver disease, which can progress to more serious liver conditions and eventually cancer. Similarly, having Type 2 diabetes is associated with increased liver cancer risk, likely because both conditions are linked to metabolic dysfunction that affects the liver.^[7]

Smoking cigarettes adds to liver cancer risk, as tobacco contains numerous harmful chemicals that damage cells throughout the body, including the liver. People who smoke and also have other risk factors like hepatitis or cirrhosis face even higher risks.^[4]

Certain inherited conditions increase susceptibility to liver cancer. These include hereditary hemochromatosis (where the body absorbs and stores too much iron), alpha-1 antitrypsin deficiency, glycogen storage disease, Wilson disease (where copper builds up in the liver), and porphyria cutanea tarda. People with these conditions need careful medical monitoring throughout their lives.^[11]

Exposure to aflatoxin B1, a fungus that can grow on improperly stored grains and nuts, is another risk factor. This is more common in certain parts of the world where food storage conditions may not be optimal. The combination of aflatoxin exposure and hepatitis B infection creates particularly high risk.^[11]

Men face higher risk than women, with liver cancer being two to three times more common in males. The reasons for this difference aren’t entirely clear but may relate to higher rates of hepatitis infection, alcohol consumption, and other risk factors in men. Age is also important, as most cases occur in people over 60 years old.^[17]

Symptoms and Warning Signs

One of the most challenging aspects of liver cancer is that it often causes no symptoms in its early stages. Tumors can grow quite large without causing any discomfort or noticeable changes. This is why many people aren’t diagnosed until the disease has already advanced significantly. When symptoms do appear, it’s often because the cancer has grown larger or the liver function has deteriorated.^[4]

As liver cancer progresses, people may notice a hard lump or sense of fullness on the right side of the abdomen, just below the rib cage. This occurs because the liver has become enlarged due to the tumor. The upper right abdomen may feel uncomfortable or painful. Some people experience pain near the right shoulder blade or in the back, which can be confusing because it seems unrelated to the liver.^[3]

Jaundice—a yellowing of the skin and the whites of the eyes—is a common symptom that occurs when the liver cannot properly process a substance called bilirubin. When bile flow is blocked or the liver isn’t functioning well, bilirubin builds up in the body, causing this distinctive yellow color. Along with jaundice, people often notice their urine becomes dark-colored and their stools turn pale or chalky gray.^[3]

The abdomen may appear swollen or feel full of fluid, a condition called ascites. This happens when fluid accumulates in the abdominal cavity because the liver isn’t producing enough proteins to keep fluid in the bloodstream, or because blood flow through the liver is blocked. The swelling can be uncomfortable and make it difficult to eat normal portions of food.^[4]

Many people with liver cancer experience a loss of appetite or feel full after eating only a small amount. This can lead to unintentional weight loss, which is often one of the first symptoms people notice. Nausea and vomiting may also occur, making it even harder to maintain proper nutrition.^[3]

Unusual tiredness or weakness that doesn’t improve with rest is common. This fatigue can be profound and affect a person’s ability to carry out daily activities. Easy bruising or bleeding happens because the liver isn’t producing enough clotting factors, proteins that help blood clot normally. People may notice they bruise from minor bumps or that cuts take longer to stop bleeding.^[3]

Some people experience persistent itching all over the body, which occurs when bile salts accumulate under the skin due to impaired liver function. Fever can also occur, though it’s less common. These symptoms overlap with many other conditions, which is why it’s important not to panic if you experience one or more of them. However, if symptoms persist for more than two weeks, you should see a healthcare provider for evaluation.^[4]

Prevention Strategies

The encouraging news about liver cancer is that many of its main risk factors can be prevented, treated, or managed effectively. Taking action to protect your liver health can dramatically reduce your chances of developing cancer later in life.^[7]

Getting vaccinated against hepatitis B is one of the most important preventive measures you can take. The hepatitis B vaccine, developed in 1982, was actually the first cancer prevention vaccine ever created. It’s highly effective and is now routinely given to infants as part of childhood vaccination schedules in many countries. Adults who weren’t vaccinated as children should talk to their healthcare provider about getting vaccinated, especially if they have other risk factors.^[16]

Testing for hepatitis C is equally important. The Centers for Disease Control and Prevention now recommends that every adult over age 18 get tested for both hepatitis B and hepatitis C at least once in their lifetime. These infections often have no symptoms, so people can be living with chronic hepatitis for years without knowing it. If hepatitis C is detected, effective antiviral treatments can cure the infection in almost all cases, significantly reducing cancer risk.^[7]

Maintaining a healthy weight through balanced nutrition and regular physical activity helps prevent fatty liver disease, which can progress to cirrhosis and cancer. If you’re overweight or have obesity, even modest weight loss can improve liver health. Focus on eating plenty of vegetables, whole grains, lean proteins, and healthy fats while limiting processed foods, sugary drinks, and excessive portions.^[7]

Limiting alcohol consumption is crucial for liver health. If you drink alcohol, do so in moderation, and if you have any liver disease or other risk factors, it’s best to avoid alcohol entirely. For people with alcohol use disorder, seeking treatment and support to stop drinking can allow the liver to heal and reduce cancer risk.^[4]

Not smoking or quitting if you currently smoke protects your liver along with many other organs. Tobacco smoke contains numerous carcinogens that damage DNA and increase cancer risk throughout the body. Many resources are available to help people quit smoking successfully.^[7]

Managing metabolic conditions like diabetes and high cholesterol through medication, diet, and exercise helps protect the liver. These conditions are interconnected with liver health, and controlling them reduces the risk of fatty liver disease progressing to more serious conditions.^[4]

For people at high risk—those with cirrhosis, chronic hepatitis, or other liver conditions—regular surveillance is critical. Healthcare providers typically recommend liver ultrasound and blood tests every six months to detect cancer early, when treatment is most likely to be successful. Early detection can truly save lives when it comes to liver cancer.^[17]

How Liver Cancer Affects the Body

Understanding what happens in the body when liver cancer develops helps explain why symptoms occur and why the disease can be so serious. The changes involve both the physical presence of tumor tissue and the disruption of normal liver functions.^[4]

As cancer cells multiply uncontrollably, they form tumors that take up space in the liver. These tumors can grow to be quite large, physically distorting the liver’s shape and putting pressure on surrounding organs. The growing tumor mass can compress the stomach, causing early satiety (feeling full quickly) and reduced appetite. It can also press on the diaphragm, causing discomfort or pain that may be felt in the shoulder area.^[4]

Cancer disrupts the liver’s normal architecture and blood flow. The liver receives blood from two sources: the hepatic artery brings oxygen-rich blood, while the hepatic portal vein brings blood containing nutrients from the intestines. Tumors can block or alter these blood vessels, creating problems with blood flow. When blood can’t flow normally through the liver, pressure builds up in the portal vein, a condition called portal hypertension. This increased pressure forces fluid out of blood vessels into the abdominal cavity, causing ascites.^[10]

Portal hypertension also causes blood to seek alternative routes back to the heart, leading to the development of enlarged veins called varices in the esophagus and stomach. These varices can rupture and cause life-threatening bleeding. The spleen often becomes enlarged as well, trapped blood accumulates there.^[4]

The liver’s ability to perform its 500-plus functions becomes progressively impaired as cancer replaces healthy tissue. The liver cannot produce adequate amounts of important proteins like albumin, which helps keep fluid in the bloodstream, and clotting factors, which are necessary for normal blood clotting. Low albumin contributes to fluid retention and swelling. Reduced clotting factors cause easy bruising and bleeding.^[4]

The liver’s capacity to process and eliminate bilirubin—a yellow pigment produced when red blood cells break down—becomes compromised. Bilirubin accumulates in the blood and tissues, causing jaundice. Bile acids also build up and deposit in the skin, causing intense itching. The liver can’t effectively filter toxins from the blood, allowing harmful substances to circulate throughout the body. When toxins reach the brain, they can cause confusion, personality changes, and sleepiness, a condition called hepatic encephalopathy.^[4]

The liver’s role in regulating blood sugar and energy storage is disrupted. This can lead to problems maintaining stable blood sugar levels, contributing to weakness and fatigue. The liver’s ability to metabolize medications and hormones is impaired, potentially causing drug side effects or hormonal imbalances.^[4]

Cancer cells can break away from the primary tumor and spread through the bloodstream or lymphatic system to other parts of the body, a process called metastasis. Common sites for liver cancer to spread include the lungs, bones, and brain. When cancer spreads, it creates additional tumors in these distant organs, causing further complications and making treatment more difficult.^[4]

The immune system’s normal surveillance and attack responses may be suppressed by the cancer and by the underlying liver disease. This makes patients more vulnerable to infections. Additionally, cancer cells can release substances that alter metabolism throughout the body, contributing to weight loss, muscle wasting, and the profound fatigue that many patients experience.^[4]

As liver function declines, the kidneys may also be affected, leading to a condition called hepatorenal syndrome where kidney function deteriorates rapidly. This occurs because altered blood flow and hormone levels affect the kidneys’ ability to filter blood and produce urine.^[4]