Comparison of ultraSound, Abbreviated MRI witH and Without HBP aS mOdalities for HCC suRveillance in patienTs With High Risk

Active surveillance in high-risk hepatocellular carcinoma (HCC) populations enables early detection of tumors. Current guidelines recommend biannual AFP testing with liver ultrasound (US), but US has suboptimal sensitivity for early HCC detection.

MRI, while highly sensitive for monitoring cirrhotic patients, is limited in routine use due to long scan times.. Several abbreviated MRI protocols have been developed for HCC detection, aiming to reduce acquisition time while improving early-stage HCC diagnostic accuracy.

This is a multicenter, randomized controlled, open-label clinical trial targeting individuals at high risk for HCC, with a planned enrollment of 1,389 participants.

This trial aims to evaluate the effectiveness of three surveillance strategies-US, non-contrast abbreviated MRI (NC-AMRI; T2WI/DW sequences ) and enhanced abbreviated MRI (E-AMRI; using gadoxetic acid disodium with T2WI/DWI/HBP sequences)-in the active monitoring of HCC in high-risk populations.

Researchers will randomly assign participants (1:1:1) to three surveillance arms, followed by a 24-month long-term follow-up after the initial 18-month monitoring. The study includes 18 months of active surveillance and 24 months of extended follow-up.

The surveillance protocols of three groups:

• Control: Biannual US + AFP;
• NC-AMRI: Alternating NC-AMRI (T2WI/DWI) and US at 6/18 months;
• E-AMRI: Alternating E-AMRI (T2WI/DWI/HBP with gadoxetic acid) and US at 6/18 months.

All the participants will be followed up every 6 months according to the above-mentioned grouping and follow-up contents. For those participants who are suspected HCC, an enhanced abdominal CT or enhanced MRI will be performed for confirmation. If the imaging suggests HCC, the research subject will be removed from the group and enter the clinical routine diagnosis and treatment process. If there is no evidence of HCC, the subject will continue to be followed up as planned. Finally, at the end of the 18-month follow-up period, a routine enhanced abdominal CT/MRI will be carried out to confirm the presence of HCC.

The primary focus of the clinic trial is the the early-stage (BCLC 0+A stage) HCC detection rate at 18th month post-enrollment, with pairwise comparisons among the three strategies.

χ² tests will compare detection rates, sensitivity, and specificity; Kaplan-Meier analysis with log-rank tests will evaluate survival. Survival analysis will include all HCC cases diagnosed in the study.

Inclusion criteria

• According to the Guidelines for the Diagnosis and Treatment of Primary Liver Cancer (2024 Edition) from department of medical administration, nation health commission of the People's Republic of China, with any one of the following high-risk factors for liver cancer: hepatitis B and/or C virus infection, excessive alcohol consumption, hepatic steatosis or metabolic dysfunction-associated liver disease, dietary exposure to aflatoxin B1, liver cirrhosis from other causes, or a family history of liver cancer, and an aMAP score (age⁃male⁃albi⁃platelets score) of 60-100 points.
• Liver disease patients with no evidence of suspected liver cancer in any imaging examination (liver US, contrast-enhanced CT, or contrast-enhanced MRI) within the past six months.
• Signed informed consent form.

Exclusion criteria

• History of previous liver cancer diagnosis.
• Baseline screening at enrollment diagnosed with liver cancer.
• Child-Pugh score ≥ 10 (class C).
• History of other malignant tumors.
• Pregnant or lactating women.
• Clinically diagnosed severe heart/lung disease or uncontrolled comorbidities, with investigator-judged life expectancy < 2 years.
• Glomerular filtration rate < 50 mL/min.
• Inability to undergo (enhanced) MRI due to contraindications or relative contraindications.
• Poor compliance or unsuitability for the clinical trial as judged by the investigator.