Fig. 2From: Contrast-enhanced ultrasound-guided sentinel lymph node biopsy in early-stage breast cancer: a prospective cohort studyStudy flowchart. BCS, breast-conserving surgery; BD, blue dye; CEUS, contrast-enhanced ultrasound; SLN, sentinel lymph node; CE-SLN, sentinel lymph nodes identified by CEUS; BD-SLN, sentinel lymph nodes identified by BDBack to article page