Collaborative Stage

Collaborative Stage for TNM 7 - Revised 12/31/2009 [ Schema ]

CS Site-Specific Factor 4
Perineural Invasion

Note: Code the presence or absence of perineural invasion as documented in the pathology report. Assign code 999 if histologic examination of the primary site was performed and perineural invasion was not mentioned.

Code	Description
000	Perineural invasion not present/not identified
010	Perineural Invasion present/identified
888	OBSOLETE DATA CONVERTED V0200 See code 988: Not applicable for this site.
988	Not applicable: Information not collected for this case (May include cases converted from code 888 used in CSv1 for "Not applicable" or when the item was not collected. If this item is required to derive T, N, M, or any stage, use of code 988 may result in an error.)
998	No histologic examination of primary site
999	Unknown if perineural invasion present or assessed Indeterminate Not documented in patient record