Hepatovenous segment II at a glance
- What it is
- Couinaud segment II is the superior part of the left lateral section of the liver.
- Location
- It lies in the left lobe, superior and lateral to the left hepatic vein, above the transverse plane through the left portal vein.
- Function
- Each Couinaud segment is a functionally independent unit of liver with its own portal triad (portal vein branch, hepatic artery branch, bile duct) and hepatic venous drainage, so it can be resected separately.
- Body system
- Digestive · single, midline structure
- FMA ID
- FMA15739 (Foundational Model of Anatomy)
Key facts
- Segments II and III form the left lateral section. They lie left of the left hepatic vein and are separated by the horizontal portal plane.
- It drains into the left hepatic vein.
Clinical relevance
Segments II and III together (left lateral section) are the graft most often used in living-donor liver transplantation for children.
Structures next to the hepatovenous segment ii
The nearest named structures in the 3D model, measured from the centre of each part:
- Middle hepatic vein · cardiovascular
- Hepatic vein · cardiovascular
- Hepatovenous segment VIII · digestive
- Hepatovenous segment III · digestive
- Posterior interventricular branch of coronary artery · cardiovascular
- Superior phrenic vein · cardiovascular
- Hepatovenous segment IV · digestive
- Portal vein · cardiovascular
- Caudate lobe of liver · digestive
- Seventh costal cartilage · skeletal
References
- Foundational Model of Anatomy: Hepatovenous segment II (FMA15739). EMBL-EBI Ontology Lookup Service.
- OpenStax. Anatomy and Physiology 2e, §23.1 Overview of the Digestive System. Rice University, 2022.
- Mitsuhashi N. et al. (2009). BodyParts3D: 3D structure database for anatomical concepts. Nucleic Acids Research 37, D782–D785. Data © The Database Center for Life Science, CC BY 4.0.
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