Influential factors and formation of extrahepatic collateral artery in unresectable hepatocellular carcinoma

Table 1 Incidence of formation of ECAs occurred in different sizes of tumors and different times of TACE.

	Tumor size (cm)			Times of chemoembolization
	≤5	≤10	10＜	0	1-2	3-4	5-6	7-
Incidence of EHCA (%)	17.9 (7/39)	76.9 (30/39)	5.1 ( 2/39)	7.7 (3/39)	5.13 (2/39)	17.9 (7/39)	56.4 (22/39)	12.8 (5/39)

Table 2 Incidence of ECAs of tumors occurred in different anatomic areas in liver and from different origin.

	Location of tumor		Origination of ECAs
	Peripheral	Central	RITA	RICA	LGA	RIPA	SMA	OTA	R ARCA
Incidence of EHCA (%)	71.8	28.2	5.1	7.7	12.8	38.5	23.1	2.6	10.3
	(28/39)	(11/39)	(2/39)	(3/39)	(5/39)	(15/39)	(9/39)	(1/39)	(4/39)