Colon and Rectum CS Schemas
Colon schema—page 271 Rectosigmoid/rectum schema—page 279
Hepatic flexure C18.3
Splenic flexure C 1 8 . 5
Overlapping C18.8 Colon, NOS C18.9
Colon and rectum each have a CS schema. The colon schema begins on page 271 of the CS Staging Manual and Coding Instructions. It is applicable for sites with ICD-O-3 topography code C18.0–C18.9. The schema for rectosigmoid and rectum begins on page 279 of the manual and is applicable for ICD-O-3 codes C19.9 and C20.9.