Surveillance for hepatocellular carcinoma: current status and future perspectives for improvement

ABSTRACT

Introduction

Hepatocellular carcinoma (HCC) is a globally relevant medical problem. Fortunately, risk factors for this tumor have been identified, and surveillance protocols developed. Patients with liver cirrhosis have the highest risk of developing HCC and have historically been included in surveillance programs. Special categories have also emerged in recent years, especially patients with eradicated HCV infection or nonalcoholic fatty liver disease. Novel serum biomarkers and magnetic resonance imaging protocols are currently being proposed to refine existing surveillance protocols.

Areas covered

We discuss the rationale of surveillance programs for HCC and report the most recent recommendations from international guidelines about this topic. Gray areas, such as nonalcoholic fatty liver disease and the role of intrahepatic cholangiocellular carcinoma, are also discussed.

Expert opinion

Surveillance is recognized as a tool to favor early diagnosis of HCC, access to curative treatment, and increase survival, even if the supporting evidence is mainly based on observational studies. As new randomized clinical trials are difficult to propose, future challenges will include optimizing implementation in the primary care setting and a more personalized approach, balancing the opportunities and risks of overdiagnosis of novel techniques and biomarkers.

PLAIN LANGUAGE SUMMARY

Not long after its development, ultrasound (US) has been used to identify liver cancer in patients with liver cirrhosis. Consequently, US-based semiannual surveillance programs have been implemented in recent decades to facilitate an early diagnosis of liver cancer and increase chances of successful radical treatment. The efficacy of these protocols has been recognized in observational studies and clinical trials. However, recent years have shown the appearance of new categories of patients with chronic liver disease. Also, imaging innovations and putative novel biomarkers appeared on the stage. This review discusses the current knowledge and future perspective of these surveillance programs for liver cancer.

KEYWORDS:

• Cirrhosis
• hepatocellular carcinoma
• liver cancer
• prevention
• surveillance
• ultrasound

Article highlights

• Cirrhotic patients are ideal candidates for HCC surveillance programs, and special groups of non-cirrhotic patients might also benefit from surveillance

• New imaging modalities to increase ultrasound accuracy are currently being investigated

• Serum biomarkers can integrate information derived from imaging

• The development of integrated surveillance protocols will be helpful in the near future

Declaration of interest

F Tovoli has served on the advisory board for Guerbet, Ipsen, Eisai, and Bayer. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.

Reviewer disclosures

Peer reviewers on this manuscript have no relevant financial or other relationships to disclose.