Grade Post Therapy
Notes
**Note 1:** Leave post-therapy grade blank when * No neoadjuvant therapy * Clinical or pathological case only * There is only one grade available and it cannot be determined if it is clinical, pathological or post-therapy **Note 2:** Assign the highest grade from the resected primary tumor assessed after the completion of neoadjuvant therapy. **Note 3:** Codes 1-4 take priority over A-D. **Note 4:** Code 9 when * Surgical resection is done after neoadjuvant therapy and grade from the primary site is not documented * Grade checked “not applicable” on CAP Protocol (if available) and no other grade information is availableNAACCR Item
NAACCR #3845Metadata
SSDI| Code | Description |
|---|---|
| 1 | G1: Tumor with areas of retinoma [retinocytoma] (fleurettes or neuronal differentiation) |
| 2 | G2: Tumor with many rosettes (Flexner–Wintersteiner or Homer Wright) |
| 3 | G3: Tumor with occasional rosettes (Flexner–Wintersteiner or Homer Wright) |
| 4 | G4: Tumor with poorly differentiated cells without rosettes and/or with extensive areas (more than half of tumor) of anaplasia |
| A | Well differentiated |
| B | Moderately differentiated |
| C | Poorly differentiated |
| D | Undifferentiated, anaplastic |
| 9 | Grade cannot be assessed (GX); Unknown |
| <BLANK> | See Note 1 |