Endoscopic ultrasound assessment and tissue acquisition of mediastinal and abdominal lymph nodes

Table 1 Endoscopic ultrasound B-mode and color-Doppler criteria for the characterization of suspected lymph nodes

	Benign LNs	Malignant LNs
B-mode criteria
Shape	Oval	Round
Border	Irregular shape	Clear-cut, asymmetric
Echogenicity	Hyperechoic	Hypoechoic
Vascular hilum	Present, central	Absent
Echostructure	Heterogeneous	Homogeneous
Color-Doppler criteria
Hilar doppler sign	Present	Absent or displaced
Subcapsular vessels	Absent	Often present
Avascular areas	Absent	Often present
Resistance index	< 0.8	> 0.8

LNs: Lymph nodes.