Collaborative Stage for TNM 7 - Revised 11/22/2010
NETColon
Neuroendocrine Tumors of Colon (excluding Appendix)
C18.0, C18.2-C18.9 
   - M-8153, 8240-8242, 8246, 8249
 
   - C18.0 Cecum
 
   - C18.2 Ascending colon
 
   - C18.3 Hepatic flexure of colon
 
   - C18.4 Transverse colon
 
   - C18.5 Splenic flexure of colon
 
   - C18.6 Descending colon
 
   - C18.7 Sigmoid colon
 
   - C18.8 Overlapping lesion of colon
 
   - C18.9 Colon, NOS
 
   - Note 1: For this schema, AJCC only stages well-differentiated neuroendocrine tumors. Note that the "concept" of well-differentiated is reflected in the histology code. The grade code is not needed in order to select the correct schema, but does need to be coded.
 
   - Note 2: This schema is also used for carcinoid tumors and malignant gastrinomas.