Abstract
Purpose To compare the frequency of dual arterial supply and its effect on the outcomes of transarterial chemoembolization (TACE) for hepatocellular carcinoma (HCC) located in the watershed regions (Couinaud segment IV and medial aspect of segment VIII) versus non-watershed regions of the liver. Materials and Methods We retrospectively reviewed the medical records for patients with HCC who underwent superselective TACE from January 2008 to December 2011 at our institution. Patients with Results Forty-two percent of watershed tumors (34 of 82) were found to have dual arterial supply, (8 tumors (10%) recognized only in hindsight), in contrast to 18% of non-watershed tumors (13 of 74, 3% unrecognized) (p Conclusion Tumors in the watershed region of the liver are particularly likely to receive dual arterial supply, and are at risk for inadequate treatment and faster TTP following TACE.
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