Collaborative Stage

Note 1: For AJCC 7th Edition, the T category is not only dependent on tumor size but also several high risk features that can upgrade the T stage.
Note 2: Based on the information in the medical record, the registrar is required to count and code the number of high risk features (each feature equals 1 risk factor). If any risk feature is unknown it can be disregarded, only record the presence of any of the following risk features:
Poorly differentiated/Undifferentiated (grade 3 or 4)
Depth >= 4 mm depth
Clark's level IV or V
Perineural invasion
Lymphovascular invasion
Primary site: skin of external ear (C44.2) OR
skin of lip (hair-bearing, also called non-glabrous lip) (C44.0)

Code	Description
000	No high risk features
001	1 high risk feature
002	2 high risk features
003	3 high risk features
004	4 high risk features
005	5 high risk features
006	6 high risk features
988	Not applicable: not collected for this
999	Unknown if any high risk features present Cannot be assessed Not documented in patient record

CS Site-Specific Factor 12
High Risk Features