Grade Clinical


**Note 1:** Grade is applicable for the follicular lymphomas only (9690/3, 9691/3, 9695/3, 9698/3). For all other lymphoma histologies, code 9. **Note 2:** Clinical grade must not be blank. **Note 3:** Assign the highest grade from the primary tumor assessed during the clinical time frame. **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 * Grade from primary site is not documented * Clinical workup is not done (for example, cancer is an incidental finding during surgery for another condition) * Grade checked “not applicable” on CAP Protocol (if available) and no other grade information is available **Note 7:** If there is only one grade available and it cannot be determined if it is clinical, pathological, or after neo-adjuvant therapy, assign as a clinical grade and code unknown (9) for pathological grade, and blank for post-therapy grade.




NAACCR #3843


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)