Fig. 6

a BLI images detected a positive sciatic lymph node in orthotopic breast cancer mouse. A clear fluorescent signal matched well with that of the bioluminescence imaging (BLI). Positive lymph nodes were resected under the NIR-II fluorescence imaging. Afterwards, the mice were sacrificed, and the rest of the enlarged lymph nodes were harvested. All the ex vivo lymph nodes was performed immediately BLI and FLI. b An identical set of images about positive axillary lymph node. c, d H&E staining images of the positive sciatic lymph node and axillary lymph node