Value of contrast-enhanced ultrasound in diagnosis and differential diagnosis of polypoid lesions of gallbladder ≥ 1 cm

Table 1 The characteristics of ALGs of different pathology types on conventional US

Final diagnosis	n	Number^a		Size (diameter)^b			Basement^c		Vascularity^d
Final diagnosis	n	Single	Multiple	< 2.0 cm	2.0—3.0 cm	> 3.0 cm	Narrow	Wide	Yes	No
Malignant lesions	34	28 (82.4%)	6 (17.6%)	7 (20.6%)	12 (35.3%)	15 (44.1%)	6 (17.6%)	28 (82.4%)	27 (79.4%)	7 (20.6%)
Benign lesions	146	77 (52.7%)	69 (47.3%)	136 (93.2%)	7 (4.8%)	3 (2.0%)	129 (88.4%)	17 (11.6%)	21 (14.4%)	125 (85.6%)
Cholesterol polyp	100	50 (50%)	50 (50%)	98 (98%)	2 (2%)	0 (0%)	96 (96.0%)	4 (4.0%)	12 (12.0%)	88 (88.0%)
Adenoma	29	17 (58.6%)	12 (41.4%)	23 (79.3%)	4 (13.8%)	2 (6.9%)	22 (75.9%)	7 (24.1%)	8 (27.6%)	21 (72.4%)
Adenomyomatosis	10	9 (90.0%)	1 (10%)	9 (90%)	1 (10%)	0 (0%)	4 (40.0%)	6 (60%)	1 (10.0%)	9 (90%)
Chronic cholecystitis	3	0 (0%)	3 (100%)	3 100%	0 (0%)	0 (0%)	3 (100%)	0 (0%)	0 (0%)	3 (100%)
Gallstone	2	1 (50%)	1 (50%)	1 (50%)	0 (0%)	1 (50%)	2 (100%)	0 (0%)	0 (0%)	2 (100%)
Hyperplastic polyp	1	0 (0%)	1 (100%)	1 (100%)	0 (0%)	0 (0%)	1 (100%)	0 (0%)	0 (0%)	1 (100%)
Metaplasic polyp	1	0 (0%)	1 (100%)	1 (100%)	0 (0%)	0 (0%)	1 (100%)	0 (0%)	0 (0%)	1 (100%)

^aNumber of the lesions showed statistically significant difference between benign and malignant lesions. χ.² = 9.950, P = 0.002
^bDiameter of the lesions showed statistically significant difference between benign and malignant lesions. t = 11.706, P = 0.000
^cStalk width of the lesions showed statistically significant difference between benign and malignant lesions. χ.² = 73.537, P = 0.000
^dDetection of blood floor within the lesions showed statistically significant difference between benign and malignant lesion. χ.² = 59.634, P = 0.000

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