Collaborative Stage Data Set - Revised 05/24/2013 FINAL

Colon

CS Site-Specific Factor 8
Perineural Invasion

Note: Code the presence or absence of perineural invasion as documented in the pathology report. Assign code 000 if histologic examination of primary site was performed, the pathology report is available for review, and perineural invasion is not mentioned.

Code	Description
000	None; no perineural invasion present
010	Perineural invasion present
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 Not documented in patient record