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 available
Metadata
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 |