Fig. 2From: Preoperative endoscopic localization of colorectal cancer and tracing lymph nodes by using carbon nanoparticles in laparoscopyPositive lymph nodes. a Positive lymph nodes with carbon nanoparticles dyed. White arrow points to carbon nanoparticles dyestuff. Black arrow points to the metastatic tumor cell clump. b Positive lymph nodes without carbon nanoparticles dyed. Black arrow points to the metastatic tumor cell clumpBack to article page