The independent indicators for differentiating renal cell carcinoma from renal angiomyolipoma by contrast-enhanced ultrasound

Table 3 CEUS characteristics of renal masses

Characteristics	Description	AML(n-22)	RCC(n = 150)	x²	P-value
Enhancement intensity	Hyper-enhancement	4(18.2)	112(74.7)	27.175	0.000^b
	Iso-enhancement	10(45.5)	17(11.3)
	Hypo-enhancement	8(36.4)	21(14.0)
Homogeneity	Homogeneous	17(77.3)	72(48.0)	6.584	0.010^a
Homogeneity	Heterogeneous	5(22.7)	78(52.0)
Wash in	Fast	2(9.1)	73(48.7)	17.642	0.000^a
	Synchronous	11(50.0)	59(39.3)
	Slow	9(40.9)	18(12.0)
Wash out	Fast	1(4.5)	84(56.0)	34.841	0.000^a
	Synchronous	2(9.1)	30(20.0)
	Slow	19(86.4)	36(24.0)
perilesional rim-like enhancement	Present	2(9.1)	115(76.7)	40.279	0.000^a
perilesional rim-like enhancement	Absent	20(90.9)	35(23.3)

AML angiomyolipoma, RCC renal cell carcinoma; Values are presented as the number (%); ^aPearson’s Chi square test; ^bFisher’s exact test

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