Surgeon excises a poion of the liver to the left of the attachment of the falciform ligament. The segments that have been resected are

Segments II and IIIare to the left of the left hepatic vein and falciform ligament with II superior and III inferior to the poal plane. segment I is the caudate lobe situated posteriorly around the IVC, segment IV includes the quadrate lobe. segment IV lies between the left and middle hepatic veins; it is subdivided into IVa(superior) and IVb (inferior) sub-segments easy tip: IVa is above and IVb is below the poal plane.