TABLE 3a.

Colon Cancer: Site-Specific Factors (SSFs) Description and Codes, SEER 18, 2010 Cases

	Known			Unknown			Total
	Codes	N	%	Codes	N	%	N
SSF 1: Carcinoembryonic Antigen (CEA)	010, 020, 030	13 322	54.5	997, 998, 999	11 115	45.5	24 437
SSF 2: Clinical Assessment of Regional Lymph Nodes	000-120	18 884	77.3	200, 400, 999	5553	22.7	24 437
2a. Select Reg LN eval = 0, 1, 5, 9	000-120	3371	61.0	200, 400, 999	2157	39.0	5528
2b. Select Reg LN eval = 0, 1, 5, 9, and CS LN = 100-300, 800	010-120	129	22.6	000, 200, 400, 999	443	77.4	572
SSF 3: Carcinoembryonic Antigen (CEA) Lab Value	000-980	13 189	54.0	997, 998, 999	11 248	46.0	24 437
SSF 4: Tumor Deposits	000-081	17 614	72.1	990, 998, 999	6823	27.9	24 437
4a. Selected surgery codes 30-80	000-081	16 487	83.7	990, 998, 999	3213	16.3	19 700
SSF 6: Circumferential Resection Margin (CRM)	000-981, 990-996	14 812	60.6	998, 999	9625	39.4	24 437
6a.Selected surgery codes 30-80	000-981, 990-996	14 499	73.6	998, 999	5201	26.4	19 700
SSF 8: Perineural Invasion	000-010	17 817	72.9	998, 999	6620	27.1	24 437
8a.Selected surgery codes 30-80	000-010	16 685	84.7	998, 999	3015	15.3	19 700
SSF 9: KRAS	010-020	1998	8.2	997, 998, 999	22 439	91.8	24 437
9a. KRAS stage IV only	010-020	1043	21.3	997, 998, 999	3858	78.7	4901

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.

LN: Lymph nodes; Reg: Regional; eval: evaluation; CS: Collaborative Stage

Note: there were no cases for not applicable (codes 988 or blank).