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 available

NAACCR Item

NAACCR #3845

Metadata

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