CS Site-Specific Factor 10

HER2: Fluorescence In Situ Hybridization (FISH) Lab Value

Notes

**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 if there are additional copies of the HER2/neu gene in the tumor cells compared to the normal number. The results are reported as a ratio between the number of copies of the HER2/neu gene and the number of copies of chromosome 17, on which the gene resides. **Note 2**: Record the actual ratio if given. Enter the stated ratio to two decimal places. Use a trailing zero if needed. **Note 3**: The same laboratory test should be used to record information in CS Site-Specific Factors 10 and 11. **Note 4**: If the test is done but the actual ratio 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.

Default

988

NAACCR Item

NAACCR #2864

Metadata

CCCR_II_ESSENTIAL_FOR_CLINICAL_DECISION
COC_CLINICALLY_SIGNIFICANT
Code Description
100-979 Ratio of 1.00 - 9.79
(Enter exact ratio to two decimal places)

Examples:
100 1.0
120 1.2
564 5.64
980 Ratio of 9.80 or greater
981-986 OBSOLETE DATA CONVERTED V0203
See code 980

Ratio of 9.81 - 9.86
987 OBSOLETE DATA CONVERTED V0203
See code 980

Ratio of 9.87 or greater
988 Not applicable: Information not collected for this case
(If this information is required by your standard setter, use of code 988 may result in an edit error.)
991 Ratio 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