**3. Conclusions**

Anastomotic leaks after colorectal surgery continue to be a serious public health problem; therefore the use of new therapies could minimize this problem.

With regard to standard tests for the prevention of ALs, they continue to be used for the structural evaluation of the anastomosis, but with the knowledge that their efficacy is often insufficient; for this reason the use of fluorescence allows us to evaluate anastomotic perfusion is becoming more and more important every day and gives us greater surgical safety for the benefit of the patient.

In addition, we must remember that the ICG is not only limited to the anastomotic perfusion, new functions begin to emerge, such as its use in tumor marking, lymphadenectomy, location of ureters, urethra, liver and peritoneal metastases, among other functions.

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**Author details**

Elvis Vargas\* and Cesar Ginesta

provided the original work is properly cited.

Gastrointestinal Surgery Department, Hospital HM, Delfos, Barcelona, Spain

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

\*Address all correspondence to: elvisvargasc@hotmail.com

*Indocyanine Green Fluorescence in Colorectal Cancer DOI: http://dx.doi.org/10.5772/intechopen.94375*

CLS Colorectal Leak Score

No IOLT No intraoperative leak test IOC Intraoperative Colonoscopy SLN sentinel lymph node LPLN Lateral pelvic lymph node

TME Total mesorectal excision

ALT Air Leak Test

ASA American Society of Anesthesiology

LPNM Lateral pelvic lymph node metastasis LPND Laparoscopic lymph node dissection

TaTME Transanal total mesorectal excision
