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 1-3 take priority over A-D. **Note 4:** For this grading system, the CAP Checklist refers to this as "histologic type," instead of grade. **Note 5:** Code 9 when * Surgical resection is done after neoadjuvant therapy and grade from the primary site is not documented * Surgical resection is done after neoadjuvant therapy and there is no residual cancer * Grade checked "not applicable" on CAP Protocol (if available) and no other grade information is availableNAACCR Item
NAACCR #3845Metadata
SSDI| Code | Description |
|---|---|
| 1 | G1: Spindle cell melanoma (>90% spindle cells) |
| 2 | G2: Mixed cell melanoma (>10% epithelioid cells and <90% spindle cells) |
| 3 | G3: Epithelioid cell melanoma (>90% epithelioid cells) |
| A | Well differentiated |
| B | Moderately differentiated |
| C | Poorly differentiated |
| D | Undifferentiated, anaplastic |
| 9 | Grade cannot be assessed (GX); Unknown |
| <BLANK> | See Note 1 |