Liver cancer is a serious condition that affects thousands of Canadians every year. It develops when abnormal cells grow uncontrolled in the liver, one of the body’s most vital organs. This guide explains what liver cancer is, how the liver works, what raises your risk, and when to talk to your family doctor or visit a walk-in clinic.
What Is Liver Cancer?
Liver cancer occurs when malignant (cancerous) tumours form in the liver. These tumours can start directly in the liver, or they can spread to the liver from another part of the body.
It is important to know that not all liver tumours are cancerous. The liver can develop both benign (non-cancerous) and malignant (cancerous) growths. Understanding the difference matters, because treatment is very different for each type.
Benign Liver Tumours
Benign liver tumours do not spread to other organs and are not considered liver cancer. However, doctors still monitor them over time. The most common types include:
Haemangiomas – tumours made up of blood vessels
Hepatic adenomas – growths in the liver cells
Focal nodular hyperplasia – an overgrowth of normal liver tissue
In most cases, benign tumours do not need treatment. However, if a haemangioma risks causing serious bleeding, a surgeon may remove it. Your doctor will advise you based on your individual situation.
Malignant Liver Tumours
Malignant liver tumours are the ones we call liver cancer. There are several types:
Hepatocellular carcinoma (HCC) – the most common form of primary liver cancer in adults
Hepatoblastoma – a rare liver cancer found in children under four years old; it responds well to treatment
Cholangiocarcinoma – cancer of the bile ducts inside or near the liver
Hepatocellular carcinoma is the type most people mean when they talk about liver cancer. Therefore, much of this article focuses on HCC and what Canadians should know about it.
How the Liver Works — and Why It Matters for Liver Cancer
The liver is one of the hardest-working organs in your body. It performs hundreds of tasks every single day. Understanding its role helps explain why liver cancer is so serious.
Your liver filters your blood continuously. It processes nutrients from your food, breaks down medications and toxins, and removes harmful waste products from your body. It also produces proteins that help your blood clot and enzymes that support digestion.
In addition, the liver plays a role in fat, protein, and carbohydrate metabolism. It even produces hormone-like substances that support other organs. No other organ — and no machine yet invented — can fully replace the liver if it stops working.
How Blood Flows Through the Liver
The liver receives blood from two separate sources. The portal vein brings nutrient-rich blood from the digestive system and spleen. The hepatic artery brings oxygen-rich blood from the heart.
Inside the liver, blood flows through tiny channels called sinusoids before draining into the inferior vena cava. This unique blood supply makes the liver efficient — but it also makes it a common landing spot for cancer cells that travel through the bloodstream from other parts of the body.
Primary vs. Secondary Liver Cancer
There are two main categories of liver cancer, and the difference is important for understanding treatment options.
Primary liver cancer starts directly in the liver. Hepatocellular carcinoma is the most common example. It usually develops in a liver that has already been damaged by inflammation, viral hepatitis, or cirrhosis (scarring of the liver).
Secondary (metastatic) liver cancer starts somewhere else in the body and spreads to the liver. In Canada and other Western countries, secondary liver cancer is actually more common than primary liver cancer. The most frequent sources are colorectal cancer, lung cancer, and breast cancer.
For more information on how cancer spreads, visit the World Health Organization’s cancer overview.
Risk Factors for Liver Cancer in Canada
Liver cancer affects men about twice as often as women. It is also more common in people over the age of 50. However, certain health conditions and lifestyle habits raise the risk significantly.
Common Risk Factors
Chronic viral hepatitis – Hepatitis B and hepatitis C are leading causes of liver cancer worldwide. Both viruses are present in Canada.
Cirrhosis – Long-term liver scarring from any cause raises liver cancer risk considerably.
Heavy alcohol use – Alcohol damages liver cells over time and can lead to cirrhosis and then liver cancer.
Non-alcoholic fatty liver disease (NAFLD) – Linked to obesity and type 2 diabetes, NAFLD is a growing concern in Canada.
Anabolic steroid use – Long-term use of anabolic steroids has been associated with liver tumours.
Aflatoxin exposure – A toxin produced by mould on certain foods; less common in Canada but worth noting for travellers.
Family history – A family history of liver disease or liver cancer may raise your risk.
Furthermore, certain inherited conditions such as hemochromatosis (iron overload) can damage the liver and increase cancer risk over time. Talk to your family doctor if any of these risk factors apply to you.
The Mayo Clinic’s liver cancer resource provides a detailed breakdown of risk factors and how they interact.
Recognising Liver Cancer Symptoms
One of the biggest challenges with liver cancer is that it often causes no symptoms in its early stages. By the time symptoms appear, the cancer may already be advanced. This is why regular screening matters for high-risk individuals.
Symptoms to Watch For
If you experience any of the following, speak to a healthcare provider as soon as possible:
Unexplained weight loss
Loss of appetite or feeling full quickly
Pain or discomfort in the upper right abdomen
Swelling or bloating in the abdomen
Yellowing of the skin or eyes (jaundice)
Unusual fatigue or weakness
Nausea or vomiting
Pale or chalky stools
Dark urine
These symptoms can be caused by many conditions, not just liver cancer. However, they should always be checked by a doctor rather than ignored.
How Is Liver Cancer Diagnosed and Treated?
If your doctor suspects liver cancer, they will usually start with blood tests and imaging scans. A blood test called AFP (alpha-fetoprotein) may be elevated in people with liver cancer. Ultrasound, CT scans, and MRI scans can all help identify tumours in the liver.
In some cases, a biopsy — where a small piece of liver tissue is removed and examined — is needed to confirm the diagnosis. Your provincial health plan covers most of these diagnostic tests when ordered by a physician.
Treatment Options
Treatment for liver cancer depends on several factors: the size and number of tumours, whether the cancer has spread, and how well your liver is functioning overall. Options may include:
Surgery – Removing part of the liver (resection) or a full liver transplant in eligible patients
Ablation therapy – Using heat or cold to destroy tumour cells without surgery
Embolisation – Blocking blood supply to the tumour
Radiation therapy – Targeting cancer cells with high-energy rays
Targeted drug therapy and immunotherapy – Newer treatments that attack cancer cells more precisely
Chemotherapy – Less commonly used for primary liver cancer but may be used for secondary tumours
The outlook for liver cancer varies greatly. Hepatocellular carcinoma caught at an early stage has much better outcomes than advanced disease. This is why prevention and early detection are so important. According to Health Canada, reducing alcohol consumption and getting vaccinated against hepatitis B are two key steps Canadians can take to lower their liver cancer risk.
When to See a Doctor
If you have any risk factors for liver cancer — such as chronic hepatitis, cirrhosis, or heavy alcohol use — speak to your family doctor about regular monitoring. Early detection gives you the best chance of successful treatment.
If you notice any of the symptoms listed above, do not wait. Book an appointment with your family doctor, or visit a walk-in clinic if your family doctor is not immediately available. Most provincial health plans cover these visits at no cost to you.
If you are unsure whether your symptoms need urgent attention, you can also call your provincial health line (such as Health811 in Ontario, 811 in BC and Alberta, or Info-Santé 811 in Quebec) for guidance from a registered nurse.
Always consult a qualified healthcare provider before making any decisions about your health. This article is for informational purposes only and does not replace professional medical advice.
Frequently Asked Questions About Liver Cancer
What are the early signs of liver cancer?
Liver cancer often has no symptoms in its early stages, which makes it hard to detect. When symptoms do appear, they may include unexplained weight loss, upper abdominal pain, or yellowing of the skin and eyes. If you notice these signs, see your family doctor promptly.
What is the most common type of liver cancer?
Hepatocellular carcinoma (HCC) is the most common type of primary liver cancer in adults. It usually develops in a liver already damaged by hepatitis or cirrhosis. Liver cancer can also be secondary, meaning it has spread to the liver from another organ such as the colon or lung.
Can liver cancer be prevented?
You can lower your liver cancer risk by getting vaccinated against hepatitis B, limiting alcohol intake, and maintaining a healthy weight to reduce fatty liver disease. Managing chronic hepatitis C with your doctor is also an important step. These are practical measures any Canadian can discuss with their family doctor.
Is liver cancer hereditary?
Liver cancer itself is not directly inherited, but some genetic conditions — such as hemochromatosis or certain metabolic disorders — can damage the liver and raise your risk over time. A family history of liver disease is worth mentioning to your doctor. Genetic counselling may be recommended in some cases.
How is liver cancer treated in Canada?
Treatment for liver cancer in Canada depends on the stage of the disease and your overall liver health. Options include surgery, liver transplant, ablation, targeted drug therapy, and radiation. Your provincial health plan covers most diagnostic and treatment costs when referred by a physician.
What is the difference between primary and secondary liver cancer?
Primary liver cancer starts in the liver itself, while secondary (metastatic) liver cancer spreads to the liver from another organ such as the colon, lung, or breast. In Canada, secondary liver cancer is actually more common than primary liver cancer. Both types require different treatment approaches.
Key Takeaways
Liver cancer can be primary (starting in the liver) or secondary (spreading from another organ).
Hepatocellular carcinoma is the most common form of primary liver cancer in adults.
The liver is a vital organ — no machine or organ can replace its many functions.
Key risk factors include chronic hepatitis B or C, cirrhosis, heavy alcohol use, and obesity.
Liver cancer often has no early symptoms, so screening is important for high-risk Canadians.
Treatment options include surgery, transplant, ablation, targeted therapy, and radiation.
Vaccination against hepatitis B and reducing alcohol intake are practical prevention steps.
If you have concerns, speak to your family doctor or visit a walk-in clinic — most provincial health plans cover these visits.
