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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: Cancer. 2014 Dec 1;120(0 0):3793–3806. doi: 10.1002/cncr.29056

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