HER2 Overall Summary
**Note 1:** This SSDI is effective for diagnosis years 2021+
* For cases diagnosed 2018-2020, leave this SSDI blank
**Note 2:** Physician statement of HER2 Overall Summary can be used to code this data item when no other information is available.
**Note 3:** HER2 may be recorded for all histologies; however, it is primarily performed for adenocarcinomas. If information is not available, code 9.
**Note 4:** The result of the HER2 test performed on the primary tissue is to be recorded in this data item.
* Use the highest (positive versus negative) when there are multiple results
**Note 5:** If neoadjuvant therapy is given, record the assay from tumor specimens prior to neoadjuvant therapy.
* If neoadjuvant therapy is given and there are no HER2 results from pre-treatment specimens, report the findings from post-treatment specimens