| 00 |
No regional lymph nodes examined |
| 01 |
One regional lymph node examined |
| 02 |
Two regional lymph nodes examined |
| .. |
| .. |
| 90 |
90 or more regional lymph nodes examined |
| .. |
| 95 |
No regional lymph node(s) removed, but aspiration of regional lymph node(s) was performed |
| 96 |
Regional lymph node removal documented as sampling, and number of lymph nodes unknown/not stated |
| 97 |
Regional lymph node removal documented as a dissection, and number of lymph nodes unknown/not stated |
| 98 |
Regional lymph nodes surgically removed, but number of lymph nodes unknown/not stated and not documented as sampling or dissection |
| 99 |
Unknown; not stated; death certificate-only |