]> M-8153, 8240-8242, 8246, 8249 C17.0 Duodenum C17.1 Jejunum C17.2 Ileum (excludes ileocecal valve C18.0) C17.3 Meckel diverticulum (site of neoplasm) C17.8 Overlapping lesion of small intestine C17.9 Small intestine, NOS Note 1: For this schema, AJCC only stages well-differentiated neuroendocrine tumors. Note that the "concept" of well-differentiated is reflected in the histology code. The grade code is not needed in order to select the correct schema, but does need to be coded. Note 2: This schema is also used for carcinoid tumors and malignant gastrinomas. CS Tumor Size Note: The assignment of T1 categories for neuroendocrine tumors (NET) of the small intestine is based on tumor size. A physician's statement of the T category may be used to code both CS Tumor Size and/or CS Extension if this is the only information in the medical record regarding one or both of these fields. However the two fields are coded independently; for example, the record may document size but not extension. Use code 991 as appropriate to code CS Tumor Size based on a statement of T when no other size information is available. Code Description 000 No mass/tumor found 001-988 989 989 mm or larger 990 Microscopic focus or foci only and no size of focus given 991 992 993 994 995 996 997 998 999 CS Extension Note 1: AJCC does not include a Tis category for Neuroendocrine Tumors (NET) of the small intestine. CS Extension code 000 is mapped to TX for AJCC stage and in situ for Summary Stage. Note 2: Ignore intraluminal or lateral extension to adjacent segment(s) of small intestine and code depth of invasion or spread outside the small intestine as indicated. Note 3: The nonperitonealized perimuscular tissue is, for jejunum and ileum, part of the mesentery and, for duodenum in areas where serosa is lacking, part of the retroperitoneum. Note 4: The assignment of the T1 category for neuroendocrine tumors (NET) of the small intestine is based on tumor size. A physician's statement of the T category may be used to code both CS Tumor Size and/or CS Extension if this is the only information in the medical record regarding one or both of these fields. However the two fields are coded independently; for example, the record may document size but not extension. Use codes 170, 210, 410, and 810 as appropriate to code CS Extension based on a statement of T when no other extension information is available. Note 5: Use code 300 for localized tumor only if no information is available to assign code 100, 110, 120. 160, 170, 200 or 210, Code Description TNM 7th Map TNM 6th Map SS77 Map SS2000 Map 000 TX Tis IS IS 050 TX Tis IS IS 100 ^ T1 L L 110 Invades lamina propria, including lamina propria in a polyp ^ T1 L L 120 Confined to and not through the muscularis mucosae, including muscularis mucosae in a polyp ^ T1 L L 130 ^ T1 L L 140 ^ T1 L L 150 ^ T1 L L 160 Invades submucosa (superficial invasion) including submucosa in a polyp ^ T1 L L 170 Stated as T1 with no other information on extension ^ T1 L L 200 Muscularis propria invaded T2 T2 L L 210 Stated as T2 with no other information on extension T2 T2 L L 300 ^ T1 L L 400 T3 T3 L L 410 Stated as T3 with no other information on extension T3 T3 RE RE 420 ERROR ERROR ERROR ERROR 450 ERROR T3 RE RE 458 Fat, NOS T3 T3 RE RE 460 T3 T3 RE RE 465 T3 T3 RE RE 470 T3 T3 RE RE 475 T3 T3 RE RE 480 T3 T3 RE RE 485 T3 T4 RE RE 488 T3 T4 RE RE 500 T4 T4 L RE 550 T4 T4 RE RE 560 ERROR ERROR ERROR ERROR 565 500 + (458, 465, 475, 480, 485, or 488) T4 T4 RE RE 600 ERROR T4 RE RE 610 T4 T4 RE RE 650 T4 T4 RE RE 660 T4 T4 RE RE 665 (610, 650, 660) + (485, 488) T4 T4 RE RE 670 T4 T4 RE RE 675 T4 T4 RE RE 678 T4 T4 RE RE 680 T4 T4 RE RE 690 ERROR ERROR ERROR ERROR 700 T4 T4 D D 800 Further contiguous extension T4 T4 D D 810 Stated as T4 with no other information on extension T4 T4 RE RE 950 No evidence of primary tumor T0 T0 U U 999 TX TX U U ^ For CS Extension codes 100-170, and 300 ONLY, the T category for AJCC 7 staging is assigned based on the value of CS Tumor Size, as shown in the Extension Size A JCC 7 Table for this schema. &generalcstsexteval; CS Lymph Nodes Note 1: Code only regional nodes and nodes, NOS in this field. Distant nodes are coded in CS Mets at DX. Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 000 No regional lymph node involvement N0 N0 NONE NONE 100 N1 N1 RN RN 200 N1 N1 D RN 300 Regional lymph node(s), NOS N1 N1 RN RN 400 Stated as N1with no other information on regional lymph nodes N1 N1 RN RN 800 Lymph nodes, NOS N1 N1 RN RN 999 NX NX U U &generalregnodeseval; &generalreglnpos; &generalreglnexam; CS Mets at DX Code Description TNM 7th Map TNM 6th Map SS77 Map SS2000 Map 00 M0 M0 NONE NONE 10 M1 M1 D D 11 M1 M1 D RN 40 M1 M1 D D 50 M1 M1 D D 60 M1 M1 D D 99 M0 MX U U &generalmetseval; ¬appssfactor1; ¬appssfactor2; ¬appssfactor3; ¬appssfactor4; ¬appssfactor5; &commonssf6smallintstomach; ¬appnewssf7; ¬appnewssf8; ¬appnewssf9; ¬appnewssf10; &commonssf11smallintstomach; &commonssf12smallintstomach; ¬appnewssf13; ¬appnewssf14; ¬appnewssf15; ¬appnewssf16; ¬appnewssf17; ¬appnewssf18; ¬appnewssf19; ¬appnewssf20; ¬appnewssf21; ¬appnewssf22; ¬appnewssf23; ¬appnewssf24; ¬appnewssf25; &commonhistinclusionnet; &commonhistologyexclusions1; &commonstagenetsmallintestineampullatnm7; &commonstagesmallintestine; &commonsummarystage; Extension Size AJCC 7 Table Note: For CS Extension codes 100-170 and 300 ONLY, the T category for AJCC 7 staging is assigned based on the value of CS Tumor Size as shown in this table. CS Extension CS Tumor Size 000 0 CS Tumor Size 001-010 1 10 CS Tumor Size 011-989 11 989 CS Tumor Size 990-991 990 991 CS Tumor Size 992-995 992 995 CS Tumor Size 996-998 996 998 CS Tumor Size 999 999 100 ERROR T1 T2 T1 T2 ERROR TX 110 ERROR T1 T2 T1 T2 ERROR TX 120 ERROR T1 T2 T1 T2 ERROR TX 130 ERROR T1 T2 T1 T2 ERROR TX 140 ERROR T1 T2 T1 T2 ERROR TX 150 ERROR T1 T2 T1 T2 ERROR TX 160 ERROR T1 T2 T1 T2 ERROR TX 170 ERROR T1 T2 T1 T2 ERROR T1 300 ERROR T1 T2 T1 T2 ERROR TX