How Can We Identify Mesorectal Fascia Involvement?
The circumferential resection margin (CRM) is the lateral or radial resection margin created by the surgeon at the total mesorectal excision. A positive CRM is defined as a closest distance of 1 mm or less between tumor and resection margin, as this represents the optimal prognostic cutoff point. The importance as a prognostic factor and as a parameter of surgical quality has been recognized and confirmed in the past 20 years . Because the ideal plane of resection in a total mesorectal excision is just outside the mesorectal fascia, a relevant question in rectal cancer surgery which is addressed in this chapter is “How can we identify mesorectal fascia involvement?”
KeywordsMagnetic Resonance Imaging Rectal Cancer Circumferential Resection Margin Rectal Cancer Surgery Mesorectal Fascia