Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Involved circumferential resection margin (CRM). (A) Axial. (B) Coronal. The CRM is said to be involved if tumor is within 1 mm of the mesorectal fascia or has visibly invaded it. Tumor-free CRM. (C) Axial. (D) Sagittal. A tumor-free CRM is assumed when the closest tumor extension, mesorectal tumor deposit, or suspicious lymph node is over 6 mm from the mesorectal fascia.
