Site/Type Override (IF25)

There are multiple versions of edits of the type, Primary Site, Morphology-Type, which check for "usual" combinations of site and ICD-O-2 or ICD-O-3 histology. The SEER version of the edit is more restrictive than the CoC edit, and thus uses a different override flag. The CoC version of the edit will accept Override CoC-Site/Type or Override Site/Type as equivalent.

• The Site/Histology Validation List (available on the SEER website) contains those histologies commonly found in the specified primary site. Histologies that occur only rarely or never are not be included. These edits require review of all combinations not listed.
• Since basal and squamous cell carcinomas of non-genital skin sites are not reportable to SEER, these site/histology combinations do not appear on the SEER validation list. For the CoC version of the edit, if Primary Site is in the range C440-C449 (skin), and the ICD-O-3 histology is in the range 8000-8005 (neoplasms, malignant, NOS), 8010-8046 (epithelial carcinomas), 8050-8084 (papillary and squamous cell carcinomas), or 8090-8110 (basal cell carcinomas), no further editing is done. No override is necessary for these cases in the CoC version of the edit.

Review of these cases requires investigating whether the combination is biologically implausible or there are cancer registry coding conventions that would dictate different codes for the diagnosis. Review of these rare combinations often results in changes to the primary site and/or morphology, rather than a decision that the combination is correct.

Instructions for Coding

• Leave blank if the EDITS program does not generate an error message for the edit Primary Site, Morphology-Type Check (SEER IF25) and/or the edit Primary Site, Morphology-Type ICDO3 (SEER IF25).
• Leave blank and correct any errors for the case if an item is discovered to be incorrect.

• Code 1 if review of all items in the error or warning message confirms that all are correct.