Hepatocellular carcinoma: diagnostic criteria by imaging techniques

Area of Science:

• Radiology
• Hepatology
• Medical Imaging

Background:

• Hepatocellular carcinoma (HCC) diagnosis heavily relies on imaging in high-risk individuals.
• Typical imaging findings include arterial enhancement with subsequent washout on CT or MRI, as per major guidelines.

Purpose of the Study:

• To evaluate the role of imaging in diagnosing HCC.
• To highlight the limitations of current imaging criteria for small lesions.
• To explore the potential of new MRI contrast agents for improved HCC characterization.

Main Methods:

• Review of diagnostic imaging criteria for HCC.
• Analysis of sensitivity and specificity of typical imaging features.
• Discussion of ancillary imaging signs.
• Consideration of recent advancements in hepatobiliary MRI contrast agents.

Main Results:

• The characteristic enhancement and washout pattern is specific but lacks high sensitivity for small HCC nodules.
• Ancillary imaging signs are often necessary to enhance diagnostic accuracy.
• Hepatobiliary MRI contrast agents show promise for better characterization of small lesions in cirrhotic livers.

Conclusions:

• While established imaging patterns are vital for HCC diagnosis, their sensitivity for small lesions is limited.
• Further research into advanced imaging techniques, such as novel MRI contrast agents, is needed to improve the detection and characterization of early-stage HCC.