Circumferential resection margin

The circumferential resection margin (CRM) is a term used in rectal carcinoma excision surgery (such as total mesorectal excision (TME)).

Pathologic evaluation of the resection margin on the excised rectum has been considered important for determining the risk of local recurrence. A margin of ≤1 mm is considered by some to be a negative prognostic factor for local recurrence 2.

The prognostic value of the CRM has been called into question in some recent studies 3. The CRM is not valid for excised colon covered by a peritoneal lining.

See also

Share article

Article information

rID: 37677
Section: Pathology
Synonyms or Alternate Spellings:
  • CRM
  • Radial resection margin
  • Circumferential resection margin (CRM)

Support Radiopaedia and see fewer ads

Cases and figures

  • Figure 1: resected rectal specimen, gross pathology
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.