Contrast-Enhanced Ultrasound Guided Biopsy of Undetermined Abdominal Lesions: A Multidisciplinary Decision-Making Approach

Table 2

Comparison of ultrasound features and biopsy success rate between US and CEUS groups.

Characteristic	US group; ( patients)	CEUS group; ( patients)	value
Size (mm)			0.54
Location
Intraperitoneal	64 (85.3%)	48 (80.0%)	0.36
Retroperitoneal	11 (14.7%)	12 (20.0%)	0.65
BMUS features
Hypoechoic	65 (86.7%)	55 (91.7%)	0.21
Solid-cystic	10 (13.3%)	5 (8.3%)	0.31
CDFI features
Inner lesion vessels	43	37	0.44
RI			0.09
Inner necrotic area
Number	31 (41.3%)	53 (88.3%)	0.04
Size (mm)			0.03
Display of major vessels
Inner lesion major vessels	5 (6.7%)	12 (20.0%)	0.03
Surrounding major vessels	2 (2.7%)	11 (18.3%)	0.02
Number of puncture attempts			0.04
Biopsy success rate	93.3% (70/75)	98.3% (59/60)	0.04

BMUS: B mode ultrasound; CDFI: color Doppler flow imaging; US: ultrasound; RI: resistance index; CEUS: contrast-enhanced ultrasound.