Organization

Field Name

ID

Required

KCR

EOD Schema Discriminator 1

30122

 

SEER

Schema Discriminator 1

3926

 

Note Since both omental and peritoneal gastrointestinal stromal tumors (GIST) are coded with the same ICD-O-3 topography code (C481), this data item must be used to identify the appropriate AJCC stage table.

Code

Description

Stage Table

1

Mesentery
Mesoappendix
Mesocolon
Pelvic peritoneum
Rectouterine pouch

  • Cul de sac
  • Pouch of Douglas
    Other specified peritoneal site

Small Intestinal, Esophageal, Colorectal, Mesenteric and Peritoneal GIST

2

Omentum

Gastic and Omental GIST

9

Unknown or no information
Not documented in medical record

Small Intestinal, Esophageal, Colorectal, Mesenteric and Peritoneal GIST

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Primary Site is NOT C481, Discriminator is not necessary

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