Site-Specific Factor 12

HER2: Chromogenic In Situ Hybridization (CISH) Lab Value


**Note 1:** Record the results of only the Chromogenic In Situ Hybridization (CISH) test for Human Epidermal Growth Factor Receptor 2 (HER2) in this field. The test determines whether there are additional copies of the HER2/neu gene in the tumor cells. The results are reported as the mean number of copies of the HER2/neu gene on either 30 or 60 tumor cells. **Note 2:** Record the actual mean if given. Enter the stated mean to two decimal places. Use a trailing zero if needed. **Note 3:** The same laboratory test should be used to record information in **Site-Specific Factor 12, HER2: Chromogenic In Situ Hybridization (CISH) Lab Value** and **Site-Specific Factor 13, HER2: Chromogenic In Situ Hybridization (CISH) Test Interpretation**. **Note 4:** If the test is done but the actual mean is not stated, use code 997. **Note 5:** If the test is not mentioned in the medical record, code to 999 unless there are circumstances under which the test isn't performed, for example, no histologic specimen.




NAACCR #2866


Code Description
100-979 Mean of 1.00 - 9.79
(Enter exact mean to two decimal places)

100 1.0
120 1.2
564 5.64
980 Mean of 9.80 or greater
988 Not applicable: Information not collected for this case
991 Mean of less than 1.00
997 Test ordered, results not in chart
998 Test not done (test not ordered and not performed)
999 Unknown or no information
Not documented in patient record