NAACCR Item #3852: HER2 ISH Dual Probe Ratio
| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired |
|---|---|---|---|---|---|---|
| 3,852 | 4 | NAACCR | 2018 | 18 |
NAACCR XML: Tumor.her2IshDualProbeRatio
Description
HER2 in situ hybridization (ISH) Dual Probe Ratio is the summary score for HER2 testing using a dual probe. The test will report results for both HER2 and CEP17, the latter used as a control. The HER2/CEP17 ratio is reported.
Rationale
HER2 ISH Dual Probe Ratio is a Registry Data Collection Variable in AJCC. It is a new data item for cases diagnosed 1/1/2018+.
Codes
| 0.0-99.9 | Ratio of 0.0 to 99.9 |
| XX.2 | Less than 2.0 |
| XX.3 | Greater than or equal to 2.0 |
| XX.7 | Test ordered, results not in chart |
| XX.8 | Not applicable: Information not collected for this case (If this item is required by your standard setter, use of code XX.8 will result in an edit error.) |
| XX.9 | Not documented in medical record Results cannot be determined (indeterminate) Dual probe test not done; only single probe test performed HER2 ISH Dual Probe Ratio not assessed or unknown if assessed |
Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.