Collaborative Stage for TNM 7 - Revised 11/20/2010
Anus
Anus, Anal Canal, and Other Parts of Rectum
C21.0-C21.2, C21.8
   - C21.0 Anus, NOS (excluding skin of anus and perianal skin C44.5)
 
   - C21.1 Anal canal
 
   - C21.2 Cloacogenic zone
 
   - C21.8 Overlapping lesion of rectum, anus and anal canal
 
   - Note:  Skin of anus is coded separately (C44.5).