Data Last Updated: Aug. 24, 2021

Grade Post Therapy Clin (yc)

Notes

**Note 1:** Leave Grade Post Therapy Clin (yc) blank when * No neoadjuvant therapy * Clinical or pathological case only * Neoadjuvant therapy completed, no microscopic exam is done prior to surgery/resection of primary tumor * There is only one grade available and it cannot be determined if it is clinical, pathological, post therapy clinical or post therapy pathological **Note 2:** Assign the highest grade from the microscopically sampled specimen of the primary site following neoadjuvant therapy or primary systemic/radiation therapy. **Note 3:** If there are multiple tumors with different grades abstracted as one primary, code the highest grade. **Note 4:** The grading system for this chapter is based on histology * Immature teratomas and serous carcinomas: Use codes L, H, or 9. This include the following ICD-O-3 codes: 8441/2, 8441/3, 8460/3, 8461/3, 8474/3, 9080/3 * All other histologies: Code 1-3 if a nuclear grade is documented, otherwise code 9 * If your registry collects ovarian borderline tumors (/1), code “B” for grade **Note 5:** G3 includes anaplastic. **Note 6:** Code 9 (unknown) when * Microscopic exam is done after neoadjuvant therapy and grade from the primary site is not documented * Microscopic exam 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
Code Description
1 G1: Well differentiated
2 G2: Moderately differentiated
3 G3: Poorly differentiated, undifferentiated
B GB: Borderline Tumor
L Low grade
H High grade
9 Grade cannot be assessed (GX); Unknown
<BLANK> See Note 1