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Grade
| Data Item | Data Item # | Text Field # | Comments |
|---|---|---|---|
| Grade Clinical | 3843 | 2570: Text-Dx Proc Path | Information obtained from initial workup (FNA, TURB, biopsy) prior to treatment |
| Grade Pathological | 3844 | 2570: Text-Dx Proc Path | Information obtained from surgical resection |
| Grade Post Therapy Clinical | 1068 | 2570: Text-Dx Proc Path | Information obtained after neoadjuvant therapy (biopsy, FNA) and prior to post neoadjuvant surgical resection |
| Grade Post Therapy Pathological | 3845 | 2570: Text-Dx Proc Path | Information obtained from post neoadjuvant surgical resection |
See Schemas | SSDI Data | (naaccr.org)
(includes general instructions for Grade) or SEER*RSA (cancer.gov) for complete coding instructions for these data items.
The grading of urothelial (transitional) tumors is based on the WHO Classification, which is a two-grade system. These histologies are either low-grade (L) or high-grade (H). Although the low-grade and high-grade are part of the histology name, the low and high can be used for assigning grade.
For the non-transitional histologies (i.e., squamous cell carcinoma, adenocarcinoma), these use a three-grade system. This three-grade system is based on the nuclear grading system.
- Well differentiated
- Moderately differentiated
- Poorly differentiated, undifferentiated, anaplastic
Grade is to be coded from the original tumor. Do not use grade information from lymph nodes, metastatic tissue, or recurrences.
| Code | Description |
|---|---|
| 1 | G1: Well differentiated |
| 2 | G2: Moderately differentiated |
| 3 | G3: Poorly differentiated |
| L | LG: Low-grade |
| H | HG: High-grade |
| 9 | Grade cannot be assessed (GX); Unknown |
For further information on coding grade for Bladder, see the Grade Manual, Grade ID: 19.
Grade manual can be found at Schemas | SSDI Data
Updated: April 22, 2025