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:** Grade is applicable for the follicular lymphomas only (9690/3, 9691/3, 9695/3, 9698/3). For all other lymphoma histologies, code 9.
**Note 3:** Assign the highest grade from the resected primary tumor assessed after the completion of neoadjuvant therapy.
**Note 4:** Follicular lymphoma grade is based on the absolute number of centroblasts per high-power (40 x objective, 0.159 square mm) microscopic field (HPF).
**Note 5:** Codes 1-5 take priority over L.
**Note 6:** 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: 0–5 centroblasts per HPF |
| 2 |
G2: 6-15 centroblasts per HPF |
| 3 |
G3: > 15 centroblasts |
| 4 |
G3A: >15 centroblasts per HPF and centrocytes present |
| 5 |
G3B: > 15 centroblasts per HPF and solid sheets of centroblasts |
| L |
Low grade: Grade 1-2 |
| 9 |
Grade cannot be assessed (GX); Unknown
Not a follicular histology (9690/3, 9691/3, 9695/3, 9698/3) |
| <BLANK> |
See Note 1 |
