Liver cancer: subtle symptoms that should not be ignored

A peculiar tiredness, a mild ache on the right-hand side, clothes beginning to feel looser.

At first glance, none of it seems serious. Or so it may appear.

Behind these seemingly ordinary signs, doctors are increasingly identifying a common enemy: liver cancer. The disease often progresses quietly, and by the time most patients reach the clinic, curative options are already far more restricted.

A cancer that works silently while everyday life continues

In its early stages, liver cancer rarely “shouts”. Instead, it whispers. Those whispers can easily be mistaken for daily stress, poor diet or too many sleepless nights.

The central problem with liver cancer is that its initial symptoms are often subtle, non-specific and easy to overlook.

Specialists advise paying particular attention to a group of signs which, if they occur together or persist for weeks, warrant closer assessment:

• ongoing fatigue with no clear explanation
• pain or a feeling of heaviness on the right side of the abdomen, just beneath the ribs
• unintentional weight loss
• loss of appetite or feeling full unusually quickly
• frequent nausea
• a swollen abdomen or a feeling of bloating
• yellowing of the skin and eyes (jaundice)
• widespread itching, particularly in people who already have liver disease

On their own, each of these symptoms may have another explanation. However, a repeated or worsening combination should raise concern, especially for people with previous liver problems, a history of hepatitis B or C, heavy alcohol consumption, obesity or type 2 diabetes.

Why so many cases of liver cancer are still diagnosed late

For many patients, the tumour is found incidentally during a routine ultrasound scan, a CT scan requested for another reason, or only at an advanced stage, when severe pain, marked weight loss and disabling weakness develop.

For people already recognised as being at higher risk – such as those with cirrhosis, chronic hepatitis or advanced fatty liver disease – specialists recommend an ultrasound scan every six months, often alongside specific blood tests.

When a tumour is found while it is still small and has not spread, the chance of cure after surgery or transplantation can comfortably exceed half of cases.

The challenge has two parts: identifying who requires close monitoring and ensuring that this surveillance genuinely continues over the years.

The new drivers: obesity, diabetes and “fatty liver”

For a long time, public perception linked liver cancer solely with severe alcohol misuse or viral hepatitis. That picture is changing rapidly.

What was called non-alcoholic steatohepatitis has now been renamed metabolic dysfunction-associated steatotic liver disease (known by the English acronym MASLD and, in its inflammatory form, MASH). It is becoming one of the leading causes of liver tumours, particularly in wealthier countries and major urban centres.

When fatty liver disease becomes a cancer risk

Not every case of “fatty liver” progresses badly. The concern begins when fat accumulation is combined with inflammation and scarring of the organ. Together, these changes significantly increase the likelihood of cirrhosis and, subsequently, cancer.

The most deceptive aspect is that, in these cases, a tumour can develop even without established cirrhosis. This undermines one of the main criteria used to decide who should enter regular screening programmes.

People with central obesity, type 2 diabetes, metabolic syndrome and advanced fatty liver disease now make up a growing group of patients with a genuine risk of liver cancer – often without realising it.

For this reason, hepatology and oncology teams have been developing risk models that combine age, sex, blood-test results and imaging findings to determine who should undergo more rigorous surveillance, even where cirrhosis has not been confirmed.

Subtle symptoms that do not fit a person’s age

One clue highlighted by doctors is a mismatch between how someone appears and what they say they are experiencing. For instance, a middle-aged adult who has always been active may begin reporting profound tiredness after climbing only a few flights of stairs, lose interest in food and notice their abdomen growing despite eating less.

Another common situation involves a patient whose tests have shown an “abnormal liver” for years and who has lived with the assumption that they simply have fat in the organ. Once side pain, weight loss and mild jaundice appear, the overall picture may already point to advanced disease.

Symptom	Why it is concerning
Persistent fatigue	When it does not improve with rest and occurs alongside weight loss or abdominal pain
Pain on the right side of the abdomen	If it is new, constant or worsens over time, especially in someone with a history of liver disease
Unintentional weight loss	When it happens without dieting or extra exercise over a few weeks or months
Jaundice (yellow skin and eyes)	It signals altered liver function and requires prompt assessment
Swollen abdomen	It may reflect fluid build-up in the abdominal cavity, a common sign of advanced liver disease

Practical prevention: from the consultation room to the kitchen

Lowering the risk of liver cancer requires a combination of medical care and lifestyle changes. Hepatitis B vaccination, appropriate treatment for hepatitis C, and control of diabetes, blood pressure and cholesterol are all part of this approach.

In everyday life, several measures have a direct effect on the liver:

• avoid excessive alcohol consumption
• stop smoking
• lose weight gradually, with professional guidance
• favour fresh foods, vegetables and wholegrains while reducing ultra-processed foods
• maintain regular physical activity, even if this consists of short daily walks

Small changes maintained for years protect the liver more effectively than radical diets followed for a few weeks.

Some observational studies suggest that moderate coffee consumption may reduce the risk of chronic liver disease progressing to cancer, possibly because of antioxidant and anti-inflammatory effects. Medicines such as metformin, used for diabetes, and statins, used for cholesterol, also feature in research as potential allies, although they are not yet prescribed solely for this purpose.

New technologies that could bring diagnosis forward

While doctors work to identify high-risk groups more accurately, researchers are pursuing more sensitive tools that can detect a tumour while it is still microscopic.

Developments under way include low-cost sensors able to identify enzymes linked to early-stage liver cancer, fluorescent probes that illuminate tumour cells during surgery and, in treatment research, nanoparticles that deliver medicines or RNA directly inside diseased cells.

The aim is twofold: to make screening easier in settings with limited resources and, at the same time, to make surgery and therapies more precise while sparing healthy tissue.

What “keeping an eye on” these symptoms means in practice

In real life, nobody goes to A&E because of one day of tiredness or an isolated bout of nausea. What matters most is the recurrence, duration and combination of symptoms.

A typical situation that merits a consultation includes:

• you have experienced fatigue for more than three to four weeks
• you have lost weight without trying
• you have discomfort on the right side of your abdomen that was not there before
• and you already know that you have fatty liver disease, diabetes or a history of hepatitis

In this context, the advice is to see a GP or hepatologist and request a more detailed assessment, including blood tests and, preferably, an ultrasound scan. The earlier this investigation begins, the greater the likelihood that any tumour will be small and treatable.

Terms that commonly confuse patients

Some words appear frequently in test reports and consultations and can cause uncertainty. Cirrhosis, for example, means extensive and permanent scarring of the liver. “Steatosis”, by contrast, means only that fat has accumulated. When a report refers to “steatohepatitis”, inflammation is also present, increasing the risk of progression.

Hepatocellular carcinoma is the technical name for the main type of primary liver cancer – meaning cancer that starts in the liver itself, rather than metastases from other tumours, such as bowel or breast cancer. Understanding this distinction can help people discuss matters more effectively with their doctor and plan treatment.

Real-life scenarios that make the risk clearer

Imagine a 58-year-old man with diabetes and excess weight who has annual health checks through work. An ultrasound scan showed “fatty liver” three years ago, but he never saw a specialist. Over the past few months, he has begun to experience a dull pain on the right side after dinner and has lost 5 kilograms without dieting. By the time he seeks medical care, the cancer occupies a large part of the organ. Hepatologists describe this type of journey as more common than many people might think.

Now consider another case: a 50-year-old woman with controlled hepatitis B who has ultrasound scans and blood tests every six months, as advised. One of these checks reveals a 1.5 cm nodule. She is referred quickly to a specialist centre, has surgery to remove the tumour and remains under follow-up. In this case, the same disease has a completely different outcome because it was detected early.

The difference between a manageable scare and a devastating diagnosis in liver cancer often lies in not underestimating subtle symptoms and in following the monitoring recommended by the doctor.