Histology Grade Extension AJCC 6 Table
Notes
**Note**: For CS Extension codes 000, 100-550, and 950-999 ONLY, where histology equals 8020, 8021, 8030, 8031, or 8032, or grade equals 4, the T category is assigned based on the value of CS Extension as shown here.
CS Extension |
T Category |
000, 950, 999 |
T4NOS |
100, 200, 300, 400 |
T4a |
405, 410, 415, 420, 490 |
ERROR: |
450, 480, 500, 520, 550 |
T4b |
CS Extension |
T Category |
000 |
T4NOS |
100 |
T4a |
200 |
T4a |
300 |
T4a |
400 |
T4a |
405 |
ERROR: |
410 |
ERROR: |
415 |
ERROR: |
420 |
ERROR: |
450 |
T4b |
480 |
T4b |
490 |
ERROR: |
500 |
T4b |
520 |
T4b |
550 |
T4b |
950 |
T4NOS |
999 |
T4NOS |