Stomach

Primary Site Histology Schema Discriminator 1
C160 8000-8149, 8154, 8160-8231, 8243-8248, 8250-8682, 8690-8700, 8720-8790, 8976 0, 3, 9
C161-C166, C168-C169 8000-8149, 8154, 8160-8231, 8243-8248, 8250-8682, 8690-8700, 8720-8790, 8976 <Any value>

Notes

C160 and Schema Discriminator 1: EsophagusGEJunction (EGJ)/Stomach: 0, 3, 9 (8000-8149, 8154, 8160-8231, 8243-8248, 8250-8682, 8690-8700, 8720-8790, 8976) All Other sites: 8000-8149, 8154, 8160-8231, 8243-8248, 8250-8682, 8690-8700, 8720-8790, 8976 C160 Cardia, esophagogastric junction C161 Fundus of stomach C162 Body of stomach C163 Gastric antrum C164 Pylorus C165 Lesser curvature of stomach, NOS C166 Greater curvature of stomach, NOS C168 Overlapping lesion of stomach C169 Stomach, NOS **Note 1:** The following sources were used in the development of this schema * SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998) (https://seer.cancer.gov/archive/manuals/EOD10Dig.3rd.pdf) * SEER Summary Staging Manual-2000: Codes and Coding Instructions (https://seer.cancer.gov/tools/ssm/ssm2000/) * Collaborative Stage Data Collection System, version 02.05: https://cancerstaging.org/cstage/Pages/default.aspx * Chapter 17 *Stomach*, in the AJCC Cancer Staging Manual, Eighth Edition (2017) published by Springer International Publishing. Used with permission of the American College of Surgeons, Chicago, Illinois. **Note 2:** See the following schemas for the listed histologies * C160 and Schema Discriminator 1: EsophagusGEJunction (EGJ)/Stomach: 2 (8000-8015, 8020, 8021-8046, 8060, 8071-8073, 8075-8076, 8078-8082, 8084-8149, 8154, 8160-8231, 8243-8248, 8250-8552, 8561-8682, 8690-8700, 8720-8790): *Esophagus (including GE junction) (excluding Squamous)* * C160 and Schema Discriminator 1: EsophagusGEJunction (EGJ)/Stomach: 2 (8020, 8050-8054, 8070, 8074, 8077, 8083, 8560): *Esophagus (including GE junction) Squamous* * 8150-8153, 8155-8156, 8158, 8240-8242, 8249, 8683: *NET Stomach* * 8710-8714, 8800-8803, 8810-8921, 8932-8934, 8940-8990, 9000-9016, 9030-9043, 9045-9138, 9141-9230, 9240-9580, 9582: *Soft Tissue Abdomen and Thoracic* * 8804-8806, 8930-8931, 8991, 9020, 9044, 9231, 9581: *Soft Tissue Rare* * 8935-8936: *GIST* * 8992: *Soft Tissue Other* * 9140: *Kaposi Sarcoma* * 9700-9701: *Mycosis Fungoides* **Note 3:** Cancers involving the EGJ that have their epicenter within the proximal 2 cm of the cardia (Siewert types I/II) are to be staged as esophageal cancers (see Esophagus GE Junction schema). Cancers whose epicenter is more than 2 cm distal from the EGJ, even if the EGJ is involved, will be staged using the stomach cancer TNM and stage groupings. **Note 4:** *Schema Discriminator 1: EsophagusGEJunction (EGJ)/Stomach* is used to discriminate between EsophagusGEJunction and Stomach which are coded to ICD-O-3 code C160.

Data Items

Name Default Value Used in Derivation NAACCR Item Required By Metadata
Year of Diagnosis No NAACCR #390
dateOfDiagnosis 		None
Primary Site Yes NAACCR #400
primarySite 		None
Histology Yes NAACCR #522
histologicTypeIcdO3 		None
Behavior No NAACCR #523
behaviorCodeIcdO3 		None
Schema Discriminator 1 Yes NAACCR #3926
schemaDiscriminator1 		All SSDI
Tumor Size Clinical No NAACCR #752
tumorSizeClinical 		None
Tumor Size Pathological No NAACCR #754
tumorSizePathologic 		None
Tumor Size Summary 999 No NAACCR #756
tumorSizeSummary 		None
Regional Nodes Positive 99 Yes NAACCR #820
regionalNodesPositive 		None
Regional Nodes Examined 99 No NAACCR #830
regionalNodesExamined 		None
RX Summ Surgery/Radiation Sequence No NAACCR #1380
rxSummSurgRadSeq 		None
RX Summ Systemic/Surgery Sequence No NAACCR #1639
rxSummSystemicSurSeq 		None
EOD Primary Tumor 999 Yes NAACCR #772
eodPrimaryTumor 		None
EOD Regional Nodes 999 Yes NAACCR #774
eodRegionalNodes 		None
EOD Mets 00 Yes NAACCR #776
eodMets 		None
SS2018 No NAACCR #764
summaryStage2018 		None
Grade Clinical 9 Yes NAACCR #3843
gradeClinical 		All SSDI
Grade Pathological 9 Yes NAACCR #3844
gradePathological 		All SSDI
Grade Post Therapy Clin (yc) No NAACCR #1068
gradePostTherapyClin 		COC
NPCR
SEER		 SSDI
Grade Post Therapy Path (yp) No NAACCR #3845
gradePostTherapy 		CCCR/Canada
COC
NPCR
SEER		 SSDI
HER2 Overall Summary 9 No NAACCR #3855
her2OverallSummary 		SEER 2021– SSDI 2021–

Initial Context

Staging Methods

Expand All | Collapse All

Summary Stage 2018

Start

Additional Context
eod_2018_t = 90
eod_2018_m = 90
eod_2018_n = 90

Next Step

  2. Derived Summary Grade
  3. derived_summary_grade

Next Step

  2. EOD Primary Tumor
  3. ss2018_t

Next Step

  2. EOD Regional Nodes
  3. ss2018_n

Next Step

  2. EOD Mets
  3. ss2018_m

Next Step

  2. Summary Stage
  3. ss2018_derived

End

Outputs

Name Default Value Description NAACCR Item Metadata
Schema ID 00170 NAACCR #3800
schemaId 		None
Derived Version {{ctx_alg_version}} None None
Derived Summary Stage 2018 9 NAACCR #762
derivedSummaryStage2018 		None
Derived Summary Grade 2018 <BLANK> NAACCR #1975
derivedSummaryGrade2018 		None