Rapid and accurate method for delineating cancer lesions in laparoscopic colectomy using activated carbon injection

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Abstract
The aim of our study was to evaluate the clinical efficacy of preoperative injection of activated carbon in delineation of cancer location in laparoscopic colectomy. Activated carbon particles were injected during endoscopy into the normal colonic wall surrounding cancer lesions in five cases of early colon cancer, prior to laparoscopic surgery. The carbon‐stained area was clearly recognizable as a blackened patch on the serosal surface of the colon. Using the carbon‐stained area as a reference point, partial colectomies were successfully performed on all five patients. The preoperative injection of activated carbon assisted in the intraoperative delineation of early colonic cancer lesions. This method is recommended for the rapid and accurate delineation of early colonic cancers in laparoscopic surgery.