NAACCR Item #440: Grade

Item # Length Source of Standard Year Implemented Version Implemented Year Retired Version Retired
440 1 SEER/CoC

NAACCR XML: Tumor.grade

Alternate Names
   Grade, Differentiation, or Cell Lineage Indicator (SEER/CCCR)
   Grade/Differentiation (CoC)
Code for the grade or degree of differentiation of the reportable tumor. For lymphomas and leukemias, field also is used to indicate T-, B-, Null-, or NK-cell origin.

Note: Code 8 was adopted for use with lymphoma cases diagnosed in 1995 and later.

See the grade tables on page 67 of ICD-O-3.16 See also the most recent CoC STORE manual and SEER Program Code Manual, for site specific coding rules and conversions.

1 Grade I
2 Grade II
3 Grade III
4 Grade IV
5 T-cell
6 B-cell
7 Null cell
8 NK (natural killer) cell
9 Grade/differentiation unknown, not stated, or not applicable
Comment: Use the most recent Hematopoietic and Lymphoid rules for assigning grades 5-8.