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


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.


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).


0KIT negative/normal; within normal limits
1KIT positive
7Test ordered, results not in chart
8Not 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.)
9Not 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.