Serial hemodynamic measurements in well-differentiated hepatocellular carcinomas

Area of Science:

• Hepatology
• Oncology
• Medical Imaging

Background:

• Well-differentiated hepatocellular carcinoma (HCC) is a common liver cancer.
• Understanding HCC growth dynamics is crucial for effective treatment strategies.

Purpose of the Study:

• To investigate the relationship between hemodynamics and tumor growth in well-differentiated HCC.
• To analyze changes in arterial and portal blood flow over time and their correlation with tumor vascularity and growth rate.

Main Methods:

• Serial hemodynamic assessments in 15 patients with 21 HCC nodules over 129-678 days.
• Arterial blood flow measured using carbon dioxide-enhanced ultrasonography (US).
• Portal blood flow measured using computed tomographic arterial portography (CTAP).

Main Results:

• Tumor hypervascularity increased significantly over time; 42.9% became homogeneously hypervascular.
• Loss of portal blood supply preceded increased arterial flow in some cases.
• Tumors losing portal flow and becoming hypervascular exhibited faster doubling times (median 172 days) compared to others (median 392 days).

Conclusions:

• Tumor growth rate in well-differentiated HCC is closely correlated with vascularity.
• Slow growth is associated with maintained portal blood flow and low vascularity.
• Rapid growth is linked to loss of portal blood flow, increased arterial supply, and hypervascularity.