Table 3.

The real-time dynamic results and qualitative analysis of contrast-enhanced ultrasonography (CEUS) in common benign parotid gland tumors (n = 110).

Qualitative variables	WT (n = 34)	PA (n = 54)	BCA (n = 22)	p
Enhancement intensity				<0.001
High	31 (91.2%)	6 (11.1%)*	22 (100%)#
Low	3 (8.8%)	48 (88.9%)*	0 (0%)#
Texture of enhancement				<0.001
Homogeneous	25 (73.5%)	3 (5.6%)*	18 (81.8%)#
Heterogeneous	9 (26.5%)	51 (94.4%)*	4 (18.2%)#
Margin after enhancement				1.000
Clear	33 (97.1%)	52 (96.2%)	21 (95.4%)
Unclear	1 (2.9%)	2 (3.8%)	1 (4.6%)
Ring enhancement				0.301
Yes	0 (0%)	3 (5.6%)	0 (0%)
No	34 (100%)	51 (94.4%)	22 (100%)
Echo-free area				<0.001
Yes	3 (8.8%)	52 (96.2%)*	0 (0%)#
No	31 (91.2%)	2 (3.8%)*	22 (100%)#
Size of the enhanced lesions				1.000
Larger	1 (2.9%)	3 (5.6%)	1 (4.5%)
Similar	33 (97.1%)	51 (94.4%)	21 (95.5%)
Wash-in pattern				<0.001
Fast in	25 (73.5%)	8 (14.8%)*	20 (90.9%)#
Slow in	9 (26.5%)	46 (85.2%)*	2 (9.1%)#
Wash-out pattern				<0.001
Fast out	4 (11.8%)	44 (81.5%)*	18 (81.8%)*
Slow out	30 (88.2%)	10 (18.5%)*	4 (18.2%)*

PA, pleomorphic adenoma; WT, Warthin tumor; BCA, basal cell adenoma.

P < 0.050 was considered to be statistically significant; CEUS, contrast-enhanced ultrasound.

Compared with WT, ^*p < 0.050 and compared with PA, ^#p < 0.050.

The bold values were considered to be statistically significant.