NAACCR Item #3865: KIT Gene Immunohistochemistry
| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired |
|---|---|---|---|---|---|---|
| 3,865 | 1 | NAACCR | 2018 | 18 |
NAACCR XML: Tumor.kitGeneImmunohistochemistry
Description
KIT Gene Immunohistochemistry (IHC) is the expression of the KIT gene in tumor tissue specimens based on immunohistochemical (IHC) stains. A positive test is a diagnostic and predictive marker for GIST tumors.
Rationale
KIT Gene Immunohistochemistry (IHC) is a Registry Data Collection Variable in AJCC. This data item was previously collected for GIST schemas in CS (different SSF’s).
Codes
| 0 | KIT negative/normal; within normal limits |
| 1 | KIT positive |
| 7 | Test ordered, results not in chart |
| 8 | Not applicable: Information not collected for this case (If this information is required by your standard setter, use of code 8 may result in an edit error.) |
| 9 | Not documented in medical record Cannot be determined by pathologist KIT 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.