KIT Gene Immunohistochemistry (IHC)

Notes

Note 1: Physician statement of KIT IHC can be used to code this data item when no other information is available.

Note 2: 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. Do not record secondary or acquired mutations that may have developed because of long-term imatinib treatment.

Note 3: Other names for KIT are CD117 or c-kit.

Default

8

NAACCR Item

NAACCR #3865

Metadata

SSDI
Code Description
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