Colorectal cancer lymph node staining by activated carbon nanoparticles suspension in vivo or methylene blue in vitro

Figure 1 Activated carbon nanoparticles suspension in vivo is effective as a tracer in colorectal cancer lymph node detection. A: Subserosal injection of activated carbon nanoparticles suspension (ACNS) into a 4-quadrant region around the mass; B: Lymph nodes can easily be identified from the mesenteric adipose tissues, arrow points to the black dyed lymph nodes; C: ACNS migrating to the lymph node (hematoxylin and eosin, ×100).