Hepatocellular carcinoma: new options for image-guided ablation

Area of Science:

• Hepatobiliary Medicine
• Interventional Radiology
• Oncology

Background:

• Image-guided percutaneous ablation is the preferred treatment for early-stage hepatocellular carcinoma (HCC) when resection or transplantation is not feasible.
• Percutaneous ethanol injection (PEI) was the initial method for local HCC treatment, showing potential to improve outcomes in non-surgical candidates but limited by high local recurrence rates.
• Radiofrequency (RF) ablation emerged as a key alternative to PEI, with extensive clinical evaluation over the past two decades.

Purpose of the Study:

• To compare the efficacy of different image-guided percutaneous ablation techniques for early-stage hepatocellular carcinoma (HCC).
• To evaluate the role of RF ablation as a primary modality compared to PEI.
• To highlight the need for further investigation into newer ablation methods.

Main Methods:

• Review of clinical studies and randomized controlled trials comparing PEI and RF ablation for HCC treatment.
• Assessment of local tumor destruction and disease control rates.
• Identification of limitations and areas for future research in ablation therapies.

Main Results:

• RF ablation demonstrates superior and more consistent tumor destruction compared to PEI.
• Radiofrequency ablation offers better local disease control than percutaneous ethanol injection.
• RF ablation has become the established standard ablative treatment for early-stage HCC.

Conclusions:

• Radiofrequency ablation is currently the most effective percutaneous ablative modality for early-stage HCC, surpassing PEI in local control.
• Newer thermal and non-thermal ablation techniques, including microwave ablation, irreversible electroporation (IRE), and light-activated drug therapy, require rigorous evaluation through randomized controlled trials.