Collaborative Stage

Collaborative Stage for TNM 7 - Revised 01/22/2010 [ Schema ]

CS Site-Specific Factor 10
Location of Primary Tumor

Note: Since both omental and peritoneal GISTs are coded with the same ICD-O-3 topography code (C48.1), this SSF must be used to identify the appropriate AJCC stage table. Users who derive only the SEER summary stages and not AJCC TNM stages may code this field 988 or leave it blank.

Code	Description	Stage Table
010	Mesentery Mesoappendix Mesocolon	GISTSmallIntestine
020	Omentum	GISTStomach
030	Pelvic Peritoneum	GISTSmallIntestine
040	Rectouterine pouch Cul de sac Pouch of Douglas	GISTSmallIntestine
988	Not applicable for this schema (may be used when AJCC staging is not derived)
998	Other specified peritoneal site	GISTSmallIntestine