Management of hepatocellular carcinoma with portal vein tumor thrombosis: Review and update at 2016

Table 1 Common classifications of portal vein tumor thrombosis in hepatocellular carcinoma

Group	Types of PVTT	Survival
Ikai et al[80]	Vp0: Absent	59% at 5 yr
	Vp1: Distal to but not in second-order branches	39.1% at 5 yr
	Vp2: In second-order branches	23.3% at 5 yr
	Vp3: In first-order branches	18.3% at 5 yr (Vp3 and Vp4)
	Vp4: In the main trunk or contralateral or both
Shi et al[17]	10: Microscopic
	1: In segmental branches or above	26.7% at 3 yr (Type 10 included)
	2: In the left or right branch	16.9% at 3 yr
	3: In the main trunk	3.7% at 3 yr
	4: In the superior mesenteric vein	0% at 3 yr
Xu et al[18]	A: In the main trunk or both the left and right branches	0% at 5 yr
	B: In only the left or right branch	5.2% at 5 yr

HCC: Hepatocellular carcinoma; PVTT: Portal vein tumor thrombosis.