CS Site-Specific Factor 20

Tumor Infiltrating Lymphocytes (TIL)


**Note 1**: Tumor infiltrating lymphocytes (TILs) are white blood cells that have migrated into a tumor from the bloodstream. They are believed to represent an immune reaction/response to the tumor cells. A brisk response may indicate a favorable prognosis. **Note 2**: Code the status of tumor infiltrating lymphocytes (TIL) in the primary tumor as documented in the pathology report.




NAACCR #2874
Code Description
000 No tumor infiltrating lymphocytes (TIL) present
010 TIL present, non-brisk
020 TIL present, brisk
030 TIL present, NOS
988 Not applicable: Information not collected for this case
(If this information is required by your standard setter, use of code 988 may result in an edit error.)
998 No histologic examination of primary site
999 Unknown or no information
Not documented in patient record