Extrahepatic Vascular Parasitization by a Hepatocellular Carcinoma

Area of Science:

• Hepatobiliary Malignancies
• Interventional Radiology
• Vascular Anatomy

Background:

• Hepatocellular carcinoma (HCC) is the most common primary liver cancer.
• Transarterial chemoembolization (TACE) is a standard treatment for unresectable HCC.
• Extrahepatic arterial supply to HCC can complicate TACE and affect treatment efficacy.

Observation:

• A case of HCC primarily supplied by a parasitized right phrenic artery is presented.
• This unusual vascular anatomy was initially overlooked.
• Identification of the aberrant phrenic artery supply was key to successful treatment.

Findings:

• Parasitized phrenic artery can be a significant source of tumor neovascularization in HCC.
• Failure to identify and embolize such collateral vessels can lead to suboptimal TACE outcomes.
• Accurate pre-procedural imaging is essential for detecting anomalous arterial supply.

Implications:

• Recognizing and addressing extrahepatic collateral supply can significantly improve TACE success rates for HCC.
• This case highlights the importance of meticulous vascular assessment in interventional oncology.
• Improved understanding of aberrant vasculature may lead to refined TACE techniques and better patient prognoses.