NAACCR Item #3823: Circumferential Resection Margin (CRM)
| Item # | Length | Source of Standard | Section Name | Year Implemented | Version Implemented | XML NAACCR ID | Parent XML Element |
|---|---|---|---|---|---|---|---|
| 3823 | 4 | NAACCR | Stage/Prognostic Factors | 2018 | 18 | circumferentialResectionMargin | Tumor |
Required Status:
NPCR Collect: No recommendation
CoC Collect: Required, site specific
SEER Collect: Required, site specific
CCCR Collect: Required, site specific; when available
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.
Allowable Values
0.0, 0.1-99.9, XX.1, XX.2, XX.3, XX.4, XX.5, XX.6, XX.7, XX.8, XX.9
Codes
| Code | Description |
|---|---|
| 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 |
Code Notes
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.