Site-Specific Factor 15

HER2: Summary Result of Testing


**Note 1:** The summary of the results of the Immunohistochemistry (IHC), Fluorescent In Situ Hybridization (FISH), Chromogenic In Situ Hybridization (CISH), or other/unknown Human Epidermal Growth Factor Receptor 2 (HER2) test is recorded here. This variable is based on **Site-Specific Factors 9, 11, 13, and 14**. **Note 2:** If both an IHC and a gene-amplification test (FISH or CISH) are performed, record the result of the gene-amplification test in this field. However, if the gene-amplification test is given first and the result is borderline or equivocal and an IHC test is done to clarify these equivocal results, code the result of the IHC test. **Note 3:** If the results of one test are available, and it is known that a second test is performed but the results are not available, use code 997.




NAACCR #2869


Code Description
010 Positive/elevated; amplified
020 Negative/normal; within normal limits; not amplified
030 Borderline; equivocal; indeterminate; undetermined whether positive or negative
988 Not applicable: Information not collected for this case
997 Test(s) ordered, results not in chart
998 Test(s) not done (test(s) not ordered and not performed)
999 Unknown or no information
Not documented in patient record