Collaborative Staging Data Items
Important
These modules are archived and should only be referenced for historical purposes.
15 items in data set
5 existing data items
- Size, extension, node items
10 new data items
- Metastases at diagnosis
- 3 "method of evaluation" T - N - M
- 6 "site specific" factors
- Only used if required
- Accommodates future editions of TNM
| Category | Standard or Site-specific |
|---|---|
| CS Tumor Size | Standard with exceptions |
| CS Extension | Site-specific |
| CS TS/Ext-Eval | Standard |
| CS Lymph Nodes | Site-specific |
| Reg LN Pos | Standard |
| Reg LN Exam | Standard |
| CS Reg Nodes Eval | Standard |
| CS Mets at Dx | Site-specific |
| CS Mets Eval | Standard |
Site-Specific Factors
Only as needed — Otherwise, 888 not applicable
- SSF1
- SSF2
- SSF3
- SSF4
- SSF5
- SSF6
Suggested Citation
SEER Training Modules: Collaborative Staging Data Items. U.S. National Institutes of Health, National Cancer Institute. Cited 19 December 2025. Available from: https://training.seer.cancer.gov.