NAACCR Item #3823: Circumferential Resection Margin (CRM)
| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired |
|---|---|---|---|---|---|---|
| 3,823 | 4 | NAACCR | 2018 | 18 |
NAACCR XML: Tumor.circumferentialResectionMargin
Description
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.
Rationale
Circumferential or Radial Resection Margin is a Registry Data Collection Variable in AJCC. It was previously collected as Colon and Rectum CS SSF# 6.
Codes
| 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.