Histology Coding Rules: Colon/Rectum
6. Code the majority of the tumor
Terms that DO NOT mean majority of tumor
With foci of; focus of/focal; areas of; elements of; component (eff.1/1/99)
Terms documented in SEER PCSM 2004, page 85
Terms that do not mean “majority of tumor” are: “with foci of,” “focus of/focal,” “areas of,” “elements of,” “component” (effective January 1, 1999). They are also found on page 85 of the SEER Program Coding and Staging Manual 2004. If these terms are used, the histology does not represent the majority of the tumor and should not be recorded as the histology.