NAACCR Item #1148: Toronto M
| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired |
|---|---|---|---|---|---|---|
| 1148 | 3 | NAACCR/SEER | 2025 | 25 |
NAACCR XML:
Tumor.torontoM
Description
This item stores the Toronto M value derived from coded fields the Toronto Stage algorithm (when applicable). Effective for cases diagnosed 1/1/2025 and forward.
Rationale
Toronto M can be used to evaluate disease spread at diagnosis, treatment patterns and outcomes over time.