CS Site-Specific Factor 5
Tumor Regression Grade
Notes
**Note 1**: Record the pathologic response to preoperative adjuvant treatment as documented in the pathology report. The response may be called "treatment effect" and will often be stated in terms of a Tumor Regression Grade of 0 to 3. The response may also be characterized in descriptive terms. Consult the pathologist if a different grading system is used. **Note 2**: Tumor regression grade or treatment effect should only be assessed on the primary tumor. **Note 3**: If a response is stated to be present or found but is not described further, use code 990.Default
988NAACCR Item
NAACCR #2920| Code | Description |
|---|---|
| 000 | Tumor Regression Grade 0 Complete response: No viable cancer cells No residual tumor |
| 010 | Tumor Regression Grade 1 Moderate response: Single cells or small groups of cancer cells |
| 020 | Tumor Regression Grade 2 Minimal response: Residual cancer outgrown by fibrosis |
| 030 | Tumor Regression Grade 3 Poor response: Minimal or no tumor kill; extensive residual cancer |
| 888 | OBSOLETE DATA CONVERTED V0200 See code 988 Not applicable for this site. |
| 988 | Not applicable: Information not collected for this case (May include cases converted from code 888 used in CSv1 for "Not applicable" or when the item was not collected. If this item is required to derive T, N, M, or any stage, use of code 988 may result in an error.) |
| 990 | Response present, but degree of response not further described |
| 998 | No preoperative treatment or no resection of primary site after preoperative treatment |
| 999 | Unknown or no information Not documented in patient record |