Abstract
Purpose There are many known variations in the arterial supply to the liver. We sought to document the incidence and details of anomalies of the extrahepatic arteries in an unselected population in the West Indies. Methods This study spanned 24 months. All 205 CT scans were evaluated at a hepatobiliary referral center in Trinidad and Tobago. We described the anomalies of the arterial supply to the liver using the conventional classification proposed by Michels. Results 205 CT scans were evaluated, and 112 persons (54.6%) had conventional Type 1 anatomy. However, compared to the incidence in the existing medical literature, we encountered a greater incidence of replaced right hepatic arteries (18.1% vs 11%; P 0.04) and a lower incidence of accessory right hepatic arteries (2.4% vs 7%; P 0.030). Conclusion Although 54.6% of persons in this West Indian population have conventional hepatic arterial supply, the distribution of anatomic variants of the right hepatic artery is quite different to that seen in North American and European centers. We found a higher incidence of replaced right hepatic arteries and a lower incidence of accessory right hepatic arteries.
Highlights
All 205 computerized tomography (CT) scans were evaluated at a hepatobiliary referral center in Trinidad and Tobago
Both facilities served as tertiary referral centers for hepatopancreatobiliary (HPB) services to other countries in the West Indies [9]. erefore, we expected the results of this study to be representative of the wider West Indian population
Type 3 variance (Figure 1), where a replaced right hepatic artery originates from the superior mesenteric artery, was present in 18.1% of West Indians as a sole variance. is is significantly greater than the 11% incidence seen in the Caucasian population studied by Michels [7]
Summary
An Investigative Study of Hepatic Arterial Anomalies in a West Indian Population. Shamir O. 2. Methods is study was performed over a 24-month period across two tertiary referral hospitals located in Trinidad and Tobago, an English-speaking island in the West Indies with a population of approximately 1.35 million persons [8]. Methods is study was performed over a 24-month period across two tertiary referral hospitals located in Trinidad and Tobago, an English-speaking island in the West Indies with a population of approximately 1.35 million persons [8] Both facilities served as tertiary referral centers for hepatopancreatobiliary (HPB) services to other countries in the West Indies [9]. Erefore, we expected the results of this study to be representative of the wider West Indian population At these centers, a multidisciplinary team comprised of radiologists, surgeons, oncologists, gastroenterologists, and pathologists met weekly to review electronic images, discuss therapeutic options, and plan management of patients with HPB diseases.
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