Collaborative Stage

Note 1: Record the results of only the Fluorescence In Situ Hybridization (FISH) test for Human Epidermal growth factor Receptor 2 (HER2) in this field. The test determines whether there are additional copies of the HER2/neugene in the tumor cells compared to the normal number. The results are reported as a ratio between the number of copies of the HER2/neugene and the control.
Note 2: Record the actual ratio if given. Enter the stated ratio to two decimal places. Use a trailing zero if needed. Example: a ratio of 1.8 is entered as 180. Ratio of 5.64 is entered as 564.
Note 3: If the test was done but the actual ratio is not stated, code 998.

Code	Description
100-986	Ratio of 1.00 to 9.86 (enter exact ratio to two decimal places)
987	Ratio of 9.87 or greater
988	Not applicable: Information not collected for this case
997	Test ordered, results not in chart
998	Test not done (test was not ordered and was not performed)
999	Unknown or no information Not documented in patient record

CS Site-Specific Factor 10
HER2: Fish Test Lab Value