Stepwise evaluation of liver sectors and liver segments by endoscopic ultrasound

Table 5 The representation of liver segments

Home base structure	Comment	Figure No.
Hepatic veins	The main left hepatic vein drains the two lateral segments of the left lobe (segments II and III)	9D
	The middle vein drains segment IV and the anterior sector of the right lobe (segments V and VIII)	9B
	The right vein drains the remainder of the right lobe (segments VI and VII) and a variable portion of segments Vand VIII	9C
Hepatic vein tributaries	The higher tributary of LHV going towards the diaphragmatic and costal surface belongs to segment II	9D
	The higher tributary of MHV going towards the diaphragmatic and costal surface belongs to segment VIII	9B, 14C, 14D
	The higher tributary of RHV going towards the diaphragmatic and costal surface belongs to segment VII	15A, 15C
	The tributary of LHV going towards the liver hilum drains segment IVa	14B
	The tributary of MHV going towards the liver hilum drains segment IVb	14D
	The tributaries of RHV going towards the liver hilum drains segments Vand VIII	9C
Right and left branches of the portal vein	The right branch of the portal vein supplies the right liver (segments Vto VIII)	7A, 7B, 7C, 7D
	The left branch of the portal vein supplies the left liver (segments II to IV)	5A, 5B, 5C, 5D, 6A, 6B
	The caudate lobe receives direct branches from both the right and left branches	12C
Segmental branches of the portal vein	The extrahepatic part supplies segment I	11D
	The anterior branch of the RPV supplies segments Vand VIII	7C
	The posterior branch of the RPV supplies segments VI and VII	7D
Right kidney	Lies lateral to the infrahepatic part of the IVC	8A
Caudate lobe	Forms an important anatomical landmark	10A, 10B, 10D, 11A, 11B, 11C

IVC: Inferior vena cava; LHV: Left hepatic vein; MHV: Middle hepatic vein; RHV: Right hepatic vein; LPV: Left branch of the portal vein; RPV: Right branch of the portal vein.