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Related Adjectives

Colon--colo, colono-
Rectum--rectal, recto-
Anus--procto-, ano-
Colon and rectum--large bowel, large intestine, colorectal

ICD-O-2/3 TERM
C18.0 Cecum
C18.1 Appendix
C18.2 Ascending colon; Right colon
C18.3 Hepatic flexure of colon
C18.4 Transverse colon
C18.5 Splenic flexure of colon
C18.6  Descending colon; Left colon
C18.7 Sigmoid colon
C18.8 Overlapping lesion of colon
C18.9 Colon, NOS
Rectosigmoid junction  
C19.9 Rectosigmoid junction
Rectum  
C20.9 Rectum, NOS
Anus and Anal canal  
C21.0 Anus, NOS (excludes 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

Each ICD-O four-digit subsite within the colon and rectum is considered a separate primary site.

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