Highlight A 51-year-old man was referred for further evaluation of a hepatic anomaly detected on abdominal ultrasonography. Contrast-enhanced computed tomography showed an extremely rare portal venous anomaly, almost like a 'portal circle'. Ataka and colleagues present the first report of this type of anomaly and describe it from an embryological perspective.
Keywords: anatomy; anomaly; embryology; portal vein.
© 2021 Japanese Society of Hepato-Biliary-Pancreatic Surgery.