TABLE 6.
Colon and Rectal Cancers: Frequency Distribution of Circumferential Resection Margins (CRMs) in Patients Who Underwent Surgical Resection+, SEER-18, 2010
| Codes | Description | Colon | Rectal | ||
|---|---|---|---|---|---|
| N | % | N | % | ||
| Total | 19 700 | 100.0 | 6134 | 100.0 | |
| 000-009 | Margin is involved with tumor; CRM positive, less than 1 mm | 1953 | 9.9 | 716 | 11.7 |
| 010-019; 992 | Between 1 mm to <2 mm | 483 | 2.5 | 244 | 4.0 |
| 020-029; 993 | Between 2 mm to <3 mm | 312 | 1.6 | 137 | 2.2 |
| 030-039,994 | Between 3 mm to <4 mm | 311 | 1.6 | 105 | 1.7 |
| 040-049,995 | Between 4 mm to <5 mm | 243 | 1.2 | 57 | 0.9 |
| 050-981,996 | ≥5 mm | 2138 | 10.9 | 563 | 9.2 |
| 990,991 | No residual tumor identified on specimen; Margins clear; CRM negative, NOS | 9059 | 46.0 | 2703 | 44.1 |
| 998-999 | Unknown or no information, CRM not mentioned | 5201 | 26.4 | 1609 | 26.2 |
Source: National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) Program: SEER 18 geographic areas: States of Connecticut, New Mexico, Utah, California (4 areas: San-Francisco, San Jose-Monterey, Los Angeles, Greater California), Hawaii, Iowa, New Jersey, Louisiana, Kentucky, Georgia (3 areas: Atlanta, Rural Georgia, and remainder of the state), Alaska Native Registry, and metropolitan areas of Detroit, Michigan and Seattle (Western Washington), Washington.
+Patients underwent surgical resection, surgery codes=30-80 (Reference: Adamo MB, Johnson CH, Ruhl JL, Dickie, LA, (eds.). 2011SEER Program Coding and Staging Manual. National Cancer Institute, NIH Publication number 11-5581, Bethesda, MD)
NOS=Not otherwise specified