NAACCR Item #3823: Circumferential Resection Margin (CRM)
|Item #||Length||Source of Standard||Year Implemented||Version Implemented||Year Retired||Version Retired|
NAACCR XML: Tumor.circumferentialResectionMargin
Circumferential or Radial Resection Margin, the distance in millimeters between the leading edge of the tumor and the surgically dissected margin as recorded on the pathology report, is a prognostic indicator for colon and rectal cancer. This may also be referred to as the Radial Resection Margin or surgical clearance.
Circumferential or Radial Resection Margin is a Registry Data Collection Variable in AJCC. It was previously collected as Colon and Rectum CS SSF# 6.
|0.0||Circumferential resection margin (CRM) positive
Margin IS involved with tumor
Described as "less than 1 millimeter (mm)"
|0.1-99.9||Distance of tumor from margin: 0.1- 99.9 millimeters (mm)
(Exact size to nearest tenth of millimeter)
|XX.0||100 mm or greater|
|XX.1||Margins clear, distance from tumor not stated
Circumferential or radial resection margin negative, NOS
No residual tumor identified on specimen
|XX.2||Margins cannot be assessed|
|XX.3||Described as "at least" 1 mm|
|XX.4||Described as "at least" 2 mm|
|XX.5||Described as "at least" 3 mm|
|XX.6||Described as "greater than" 3 mm|
|XX.7||No resection of primary site
Surgical procedure did not remove enough tissue to measure the circumferential or radial resection margin
(Examples include: polypectomy only, endoscopic mucosal resection (EMR), excisional biopsy only, transanal disk excision)
|XX.8||Not applicable: Information not collected for this case
(If this information is required by your standard setter, use of code XX.8 may result in an edit error.)
|XX.9||Not documented in medical record
Circumferential or radial resection margin not assessed or unknown if assessed
Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.