Computer-assisted three-dimensional individualized extreme liver resection for hepatoblastoma in proximity to the major liver vasculature

Table 2 The proximity to the major liver vasculature and preoperative evaluation of these 16 hepatoblastoma patients

No.	PMV			Tumor number	Tumor location	Preoperative evaluation and simulated LR
	Classification	Blood vessel	Group			Simulated mode	Surgical planning	FLV (cm3)	FLV/TLTV
1	Within 1 cm	IVC	V0	2	Both lobes	Anatomical LR	Right hepatectomy	373.5	54%
	TT	Right HV	V3
2	Touching	BPV	P1	1	Right lobe	Anatomical LR	Right hepatectomy	177.1	48%
3	Compressing	IVC	V2	1	Middle lobe	Anatomical LR	Extended right hepatectomy	109.7	46%
4	Touching	MPV	P1	1	Middle lobe	Autonomous LR	Extended right hepatectomy; Extended left hepatectomy; Right hepatectomy	288.2	74%
5	Compressing	All intrahepatic veins	V2+P2	1	Middle lobe	Autonomous LR	Right hepatectomy	343	54%
6	Within 1 cm Touching	IVC	V0	1	Right lobe	Anatomical LR		189.3	46%
7	TT	IVC	V1	1	Right lobe	Anatomical LR	Mesohepatectomy	368	59%
	Compressing	Right PV	P3				Right hepatectomy
8	Touching	All intrahepatic veins	V2+P2	1	Middle lobe	Anatomical LR		177.5	37%
9	Touching	IVC	V1	1	Middle lobe	Anatomical LR	Left hepatectomy + VII	90.6	39%
	Touching	BPV	P1				Right hepatectomy
10	Touching	BPV	P1	3	Both lobes	Anatomical LR and		348.8	58%
11	Touching	IVC	V1	1	Right lobe	Tumor dissection	Right hepatectomy	287.9	55%
	Touching	BPV	P1			Anatomical LR	Right hepatectomy
12	Touching	IVC	V1	1	Right lobe			355.1	43%
13	Touching	IVC	V1	1	Right lobe	Anatomical LR	Right hepatectomy + II	224.6	34%
	Touching	All HVs	V1			Anatomical LR	Right hepatectomy
14	Touching	IVC	V1	2	Both lobes			341.5	56%
15	TT	IVC	V1	1	Right lobe	Anatomical LR	Right hepatectomy	480.5	59%
16	Touching	PV	P3			Anatomical LR
	Compressing	IVC	V1	1	Middle lobe			146.9	38%
		BPV	P2			Anatomical LR

PMV: Proximity to the major liver vasculature; LR: Liver resection; FLV: Future liver remnant volume; TLTV: Total volume of liver and tumor; TT: Tumor thrombus; IVC: Inferior vena cava; HV: Hepatic vein; BPV: The bifurcation of the portal vein; MPV: The main of the portal vein; PV: Portal vein.