EASL updates liver cancer guidelines at International Liver Congress

Liz Highleyman
Published:
13 April 2018
The EASL liver cancer guidelines panel answer questions at The International Liver Congress, 2018. Photo by Liz Highleyman.

The European Association for the Study of the Liver (EASL) presented updated clinical practice guidelines for the management of hepatocellular carcinoma (HCC) during a special session at the 2018 International Liver Congress yesterday in Paris. The full guidelines are now available online.

An expert panel made up of hepatologists, oncologists and other specialists developed the recommendations based on an extensive review of relevant studies – the guidelines include more than 600 references – focusing on advances since the guidelines were last updated in 2012. Of note, the number of systemic medications for HCC has risen from just one to half a dozen.

"The rising incidence of HCC in most European countries suggests an insufficient awareness of liver disease in general, calling for public health policies aiming to prevent, detect and treat liver disease—not only for HCC prevention," the panel wrote. "It is particularly frustrating to see most patients with HCC diagnosed at a stage no longer amenable to curative treatment, demonstrating again a neglect of liver disease and appropriate cancer surveillance."

Glossary

hepatocellular carcinoma (HCC)

Liver cancer. A long-term complication of chronic inflammation of the liver or cirrhosis.

Liver cancer is the fifth most common cancer and the second leading cause of cancer-related death, with about 854,000 new cases and 810,000 deaths per year, according to the guidelines. About 85% of all cases occur in East Asia and sub-Saharan Africa. HCC accounts for around 90% of primary liver cancers, meaning they originate in the liver. (Cancers that arise elsewhere in the body and spread to the liver are not properly considered liver cancer.)

Over years or decades, chronic hepatitis B or C virus infection, heavy alcohol consumption, fat accumulation in the liver and other causes of liver injury can lead to development of liver cirrhosis and HCC. A majority of liver cancer cases in Asia and Africa are attributable to hepatitis B, while chronic hepatitis C appears to be the major risk factor in Western countries, according to the guidelines. Non-alcoholic fatty liver disease (NAFLD) associated with metabolic syndrome, diabetes and obesity seems to be a growing cause.

Liver cancer is often detected late, when it is difficult to treat. Depending on its stage, HCC may be treated with surgery to remove part of the liver (known as resection), liver transplantation, local therapies to destroy tumours, or systemic drugs – or a combination of these. But many people experience continued disease progression or recurrence and survival is typically measured in months.

The panel made recommendations in several areas:

  • Epidemiology, risk factors and prevention
  • Surveillance
  • Diagnosis and recall policy
  • Staging systems and treatment allocation
  • Response assessment
  • Liver resection
  • Liver transplantation
  • Local ablation and external radiation
  • Transarterial therapies
  • Systemic therapies
  • Palliative and best supportive care.

Prevention

With regard to liver cancer prevention, the panel recommended hepatitis B vaccination for infants and people in high-risk groups. Government health agencies should implement policies to prevent hepatitis B and C transmission, curb alcohol abuse and "encourage lifestyles that prevent obesity and metabolic syndrome," the panellists wrote.

Antiviral therapies that suppress hepatitis B virus and cure hepatitis C are recommended, as they have been shown to prevent progression to cirrhosis and HCC development. Even after cirrhosis is present, antiviral therapy can reduce the likelihood of progression to liver cancer, though the risk is not completely eliminated.

Panel members addressed the controversy around whether HCC recurrence is more likely in people who are cured of hepatitis C using direct-acting antivirals (DAAs), advising close surveillance of this population. Presenting an overview of the guidelines, panel chair Peter Galle of University Medical Centre in Mainz, Germany, said that growing evidence suggests the apparent effect is due to the patient population – sicker people were treated first with DAAs – but it remains an area of concern.

In a recommendation that drew considerable appreciation, the panel said that coffee has been shown to decrease the risk of HCC in people with chronic liver disease and coffee consumption should be encouraged. 


"Coffee has a sort of chemopreventive quality," Galle explained. "There are uncertainties related to the amount, and caffeinated versus decaffeinated, and there is no reason to think it has an effect on existing tumours."

Surveillance and diagnosis

The panel recommended enhanced screening programmes to identify people at risk for HCC. Regular surveillance is strongly advised for people with liver cirrhosis, with a weaker recommendation for those with advanced (stage F3) liver fibrosis. Some people who have hepatitis B without cirrhosis are also considered at risk for HCC. The role of surveillance for people without cirrhosis with NAFLD is not yet clear.

Abdominal ultrasound every six months is recommended. The panellists noted that accurate biomarkers for early detection of HCC are still lacking. Alfa fetoprotein (AFP) is sometimes used, but is "suboptimal in terms of cost-effectiveness for routine surveillance of early HCC," they wrote.

Non-invasive imaging can be used to diagnose people with cirrhosis who have larger tumours (>1 cm), but for most others pathological evidence from a biopsy should be used to confirm a diagnosis. CT and MRI scans are the preferred imaging methods. People at high risk for HCC with tumours smaller than 1 cm should undergo follow-up screening no less than every 4 months. Repeat biopsies are advised for people with inconclusive results.

Surgery and local therapies

A majority of the guidelines are devoted to various forms of liver cancer treatment, starting with surgery and so-called loco-regional therapies that aim to destroy tumours within the liver.

"Surgery is the mainstay of hepatocellular carcinoma treatment, leading to the best outcomes of any treatment available in well-selected candidates," with five-year survival rates of 60 to 80%, according to the panel.

Liver resection and liver transplantation are the first options for people with early tumours, according to the guidelines. Surgery can often be useful for more advanced HCC as well, especially if other therapies can be used to shrink tumours before the operation. Resection is not considered suitable for people whose cancer has invaded major blood vessels in the liver.

Decisions about liver resection in people with cirrhosis should be based on factors including liver function, portal hypertension, how much of the liver would be left after surgery and overall health status and co-morbidities. 
Laparoscopic surgery and other less invasive approaches are recommended if available. 

Recurrence is common after surgery and follow-up is recommended every 3 to 4 months for the first year. Neoadjuvant (starting before surgery) or adjuvant (taken after surgery) therapies are not recommended to prevent recurrence because they have not yet been shown to improve outcomes. However, the panel encouraged further clinical trials with new drugs such as checkpoint inhibitors. 


The guidelines extensively discuss liver transplantation, including donor organ allocation policies and living donor transplants. The short supply of donor livers severely limits the availability of this option.

The guidelines also go into detail about local ablation techniques. Radiofrequency thermal ablation is the standard of care for people with early HCC not suitable for surgery, and it can replace surgery as first-line treatment for those with very early cancer. Ethanol injection is another option, and microwave ablation shows some promise, but there is little evidence to support external beam radiation therapy.

Transarterial chemoembolisation (TACE) involves injection of chemotherapy drugs and blockage of blood vessels that supply tumours. It is the most widely used primary treatment for unresectable HCC, but it is not indicated for people with decompensated liver disease, metastatic liver cancer or kidney dysfunction.

Selective internal radiation therapy (SIRT), also known as radioembolisation, uses radioactive beads to target tumours. Although studies have shown that this approach has a good safety profile and can control local tumours, it has not yet demonstrated an overall survival benefit relative to systemic therapy.

Systemic therapies

Systemic therapies, or drugs that affect the whole body, have seen the most evolution since the previous guidelines, but some promising newer agents are still considered experimental and are not included in this version.

The recommended systemic drugs are targeted therapies that interfere with kinases, a large family of enzymes that play a role in processes that allow cancer to grow and spread.

Sorafenib (Nexavar) is the standard-of-care first-line systemic therapy for people with advanced HCC or those with early tumours who are either considered unsuitable for or who experience disease progression on loco-regional therapies.

The guidelines also recommend lenvatinib (Lenvima), which has been found to be non-inferior to sorafenib, as an alternative first-line therapy for people with advanced HCC and good liver function.

Regorafenib (Stivarga) is recommended as a second-line treatment for people who experience disease progression on sorafenib. Studies have also shown that cabozantinib (Cabometyx tablet formulation and Cometriq capsule formulation) improved survival in this patient group.

Galle noted that Eli Lilly recently announced results from a study showing that ramucirumab (Cyramza), a VEGF inhibitor that blocks blood vessel formation, increased overall survival and progression-free survival in people with liver cancer with high AFP levels.

EASL does not yet recommend immunotherapy for liver cancer. Last September the US Food and Drug Administration (FDA) approved nivolumab (Opdivo) as second-line therapy for people with HCC who were previously treated with sorafenib, but it is not yet approved for this indication in Europe.

Nivolumab is a monoclonal antibody that blocks PD-1, a receptor on T cells that plays a role in regulating immune function. Some tumours can use PD-1 to turn off immune responses against them, and drugs that block PD-1 can restore T-cell activity.

FDA approval was based on promising findings from the CheckMate 040 trial, which showed that nivolumab led to tumour shrinkage or disease stabilisation in just over half of treated people. But the EASL panel noted that this was an uncontrolled phase 2 study and they await phase 3 data.

"This is very promising, but it's not recommended in Europe yet," Galle said.

Targeted therapies and immunotherapies work very well for some people with liver cancer, but show little effectiveness for others. Experts do not yet know how to predict which people will benefit, and development of predictive biomarkers is one of the most active areas of cancer research

The panel emphasised that the new EASL recommendations are intended to guide clinical practice where all possible resources and therapies are available. The members acknowledged that providers will have to make adjustments to account for local regulations, drug availability, provider capacity, infrastructure and cost-benefit analyses.

Reference

European Association for the Study of the Liver. EASL Clinical Practice Guidelines: Management of hepatocellular carcinoma. Journal of Hepatology, in press 2018 (available in advance online).