Which structure is the remnant of the umbilical vein and separates the left lobe into medial and lateral parts?

Which structure is the remnant of the umbilical vein and separates the left lobe into medial and lateral parts?

• A. Ligamentum venosum
• B. Falciform ligament
• C. Ligamentum teres
• D. Main lobar fissure

Answer: (C)

The remnant of the umbilical vein is the ligamentum teres hepatis (round ligament). After birth, the umbilical vein closes and becomes this fibrous cord that runs in the fissure along the free edge of the falciform ligament, effectively marking the boundary between the left lobe’s medial and lateral parts. In other words, the ligamentum teres sits in a groove on the liver’s visceral surface and defines that left-lobe division. It’s distinct from the ligamentum venosum, which is the remnant of the ductus venosus and marks a different border (between the left lobe and caudate l lobe), and from the main lobar fissure, which is a broader separation between right and left lobes but not the umbilical vein remnant.

The remnant of the umbilical vein is the ligamentum teres hepatis (round ligament). After birth, the umbilical vein closes and becomes this fibrous cord that runs in the fissure along the free edge of the falciform ligament, effectively marking the boundary between the left lobe’s medial and lateral parts. In other words, the ligamentum teres sits in a groove on the liver’s visceral surface and defines that left-lobe division. It’s distinct from the ligamentum venosum, which is the remnant of the ductus venosus and marks a different border (between the left lobe and caudate l lobe), and from the main lobar fissure, which is a broader separation between right and left lobes but not the umbilical vein remnant.