]> M-8153, 8240-8242, 8246, 8249 C16.0 Cardia of stomach C16.1 Fundus of stomach C16.2 Body of stomach C16.3 Gastric antrum C16.4 Pylorus C16.5 Lesser curvature of stomach, NOS C16.6 Greater curvature of stomach, NOS C16.8 Overlapping lesion of stomach C16.9 Stomach, 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 the T1 category for neuroendocrine tumors (NET) of the stomach 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. Note 2: Codes 992-995 were obsolete in CSVersion 2, V0201 and V0202. They are made active in V0203. Tumors that now fall into one of these categories would have been coded as 011, 021, or 999 in V0201/V0202. 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 991 992 993 994 995 998 999 CS Extension Note 1: For this schema, AJCC defines Tis as carcinoma in situ/dysplasia (tumor size less than 0.5mm), confined to mucosa. Neuroendocrine tumors (NET) stated to be in situ, noninvasive, or confined to mucosa are classified as Tis. "Dysplasia" alone is generally not reportable in cancer registries but, if a registry does collect it, code 000 should be used. Note 2: Intraluminal or intramural extension to esophagus and duodenum is classified by the depth of greatest invasion. For extension to esophagus or duodenum via serosa, see code 600. Note 3 : The assignment of the T1 category for NETs of the stomach 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, 390, 480, or 810 as appropriate to code CS Extension based on a statement of T when no other information is available. Note 3: Use code 300 for localized tumor only if no information is available to assign code 100, 110, 120, 160. 170, 200, 390, or 400. Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 000 Tis Tis IS IS 050 Tis Tis IS IS 100 Tumor confined to mucosa, NOS including intramucosal, NOS Tis T1 L L 110 Invades lamina propria, including lamina propria in a polyp ^ T1 L L 120 Invades 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 Invades into but not through muscularis propria T2 T2a L L 300 ^ T1 L L 340 ERROR ERROR ERROR ERROR 350 ERROR T2a RE L 390 Stated as T2 with no other information on extension T2 T2NOS L L 400 T3 T2b L L 450 T3 T2b RE RE 480 Stated as T3 with no other information on extension T3 T3 RE RE 490 ERROR ERROR ERROR ERROR 500 T4 T3 RE RE 550 T4 T3 RE RE 600 T4 T4 RE RE 610 T4 T4 RE RE 650 T4 T4 D D 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 110-170 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 AJCC 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. Note 2: Hepatoduodenal nodes are regional for primaries of the lesser curvature of the stomach. They are coded in CS Mets at DX for all other subsites in this schema. Note 3: If information about named regional lymph nodes is available, use codes 110, 400, or 420 rather than code 500 or 600. Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 000 No regional lymph node involvement N0 N0 NONE NONE 050 Nodule(s) in perigastric fat N1 * RN RN 100 N1 * RN RN 110 N1 * RN RN 400 N1 * D RN 420 N1 * D D 500 Regional lymph nodes, NOS N1 * RN RN 600 Stated as N1 with no other information on regional lymph nodes N1 N1 RN RN 650 ERROR N2 RN RN 700 ERROR N3 RN RN 800 Lymph nodes, NOS N1 N1 RN RN 999 NX NX U U * For CS Lymph Nodes codes 050-500 and 800 ONLY, when CS Lymph Nodes Eval is 0, 1, 5, or 9, the N category is assigned as shown in the Lymph Nodes Clinical Evaluation Table, using Regional Nodes Positive and CS Site-Specific Factor 1; when CS Lymph Nodes Eval is 2, 3, 6, 8, or not coded, the N category is assigned as shown in the Lymph Nodes Pathologic Evaluation Table Also Used When CS Reg Nodes Eval Is Not Coded using Regional Nodes Positive. &generalregnodeseval; &commonreglnpos_active; &generalreglnexam; CS Mets at DX Code Description TNM 7 Map TNM 6 Map SS77 Map SS2000 Map 00 No distant metastasis M0 M0 NONE NONE 10 M1 M1 D D 40 M1 M1 D D 50 M1 M1 D D 60 M1 M1 D D 99 M0 MX U U &generalmetseval; CS Site-Specific Factor 1 Clinical Assessment of Regional Lymph Nodes Note 1: Only include information from imaging and physical examination in this item. Do not include information on regional lymph nodes that is based on surgical observation or diagnostic lymph node biopsy. Note 2: Use code 400 if nodes are involved clinically but there is no indication of number of nodes involved. Do not use nodal involvement determined pathologically to code this data item. Note 3: If there is no diagnostic work-up to assess regional lymph nodes, use code 999. Do not apply the inaccessible nodes rule that presumes unmentioned nodes to be negative. Code Description 000 100 200 300 400 888 988 999 ¬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; AJCC TNM 7 Stage T N M Stage T0 N0 M0 ERROR T0 N1 M0 IIIB T0 NX M0 UNK Tis N0 M0 0 Tis N1 M0 ERROR Tis NX M0 0 T1 N0 M0 I T1 N1 M0 IIIB T1 NX M0 UNK T2 N0 M0 IIA T2 N1 M0 IIIB T2 NX M0 UNK T3 N0 M0 IIB T3 N1 M0 IIIB T3 NX M0 UNK T4 N0 M0 IIIA T4 N1 M0 IIIB T4 NX M0 UNK TX N0 M0 UNK TX N1 M0 IIIB TX NX M0 UNK T0 N0 M1 IV T0 N1 M1 IV T0 NX M1 IV Tis N0 M1 ERROR Tis N1 M1 ERROR Tis NX M1 ERROR T1 N0 M1 IV T1 N1 M1 IV T1 NX M1 IV T2 N0 M1 IV T2 N1 M1 IV T2 NX M1 IV T3 N0 M1 IV T3 N1 M1 IV T3 NX M1 IV T4 N0 M1 IV T4 N1 M1 IV T4 NX M1 IV TX N0 M1 IV TX N1 M1 IV TX NX M1 IV &commonstagestomach; &commonsummarystage; Extension Size AJCC 7 Table Note: For CS Extension codes 110-170 and 300 ONLY, the T category 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 998 998 CS Tumor Size 999 999 110 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 &commonextralymphnodesclinicalevalstomach; &commonextralymphnodespathologicevalstomach;