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Test ID KINET Ki-67(MIB-1), Gastrointestinal/Pancreatic Neuroendocrine Tumors, Quantitative Immunohistochemistry, Automated

Reporting Name

Ki67 GI/Pancreas NET IHC Automated

Useful For

Determining proliferation of tumor cells in paraffin-embedded tissue blocks from patients diagnosed with neuroendocrine tumors of the pancreas or gastrointestinal tract including metastases

Clinical Information

Ki-67(MIB-1 clone) is a monoclonal antibody that reacts with cells undergoing DNA synthesis by binding to the Ki-67 antigen, a marker known to be expressed only in proliferating cells. By measuring the amount of tumor cells expressing Ki-67, an estimate of DNA synthesis can be determined. Studies suggest that Ki-67(MIB-1) analysis of paraffin-embedded tissue specimens may provide useful prognostic information in various tumor types.


Results will be reported as a percentage of tumor cells staining positive for Ki-67(MIB-1). Quantitative Ki-67(MIB-1) results should be interpreted within the clinical context for which the test was ordered.

Report Available

4 to 6 days

Day(s) Performed

Monday through Friday

Clinical Reference

1. Bosman F, Carneiro F, Hruban R, et al: WHO classification of tumours of the digestive system. Lyon: International Agency for Research on Cancer, 2010

2. Hochwald SN, Zee S, Conlon KC, et al: Prognostic factors in pancreatic endocrine neoplasms: an analysis of 136 cases with a proposal for low-grade and intermediate-grade groups. J Clin Oncol 2002;20:2633-2642

3. Klimstra DS, Modlin IR, Coppola D, et al: The pathologic classification of neuroendocrine tumors: a review of nomenclature, grading, and staging systems. Pancreas 2009;39:707-712

4. Klimstra DS, Modlin IR, Adsay NV, et al: Pathology reporting of neuroendocrine tumors: application of the Delphic consensus process to the development of a minimum pathology data set. Am J Surg Pathol 2010;34:300-313

5. Pathology and Genetics Tumours of Endocrine Organs. Edited by RA DeLellis, RV Lloyd, PU Heitz, C Eng. IARC Press, 2004

Method Name

Immunohistochemistry, Automated Quantitation, Hot-Spot Technique

Specimen Type


Ordering Guidance

If ordering for diagnostic purposes, order PATHC / Pathology Consultation and request the stain.

Shipping Instructions

Attach the green pathology address label included in the kit to the outside of the transport container.

Necessary Information

1. Pathologist's name, address, and phone number are required.

2. Include accompanying pathology report stating the final diagnosis. If not available, a preliminary diagnosis is acceptable.

Specimen Required

Supplies: Pathology Packaging Kit (T554)


Specimen Type:

Preferred: Formalin-fixed, paraffin-embedded tissue block containing neuroendocrine tumor of the pancreas or gastrointestinal (GI) tract including metastases.

Acceptable: 2 unstained sections, containing neuroendocrine tumor of the pancreas or GI tract including metastases, on charged slides cut at 4 microns <1 month ago. Tissue on the slides should have been fixed in 10% neutral buffered formalin.

Submission Container/Tube: Pathology Packaging Kit (T554)

Collection Instructions: Submit formalin-fixed, paraffin-embedded tissue block.

Additional Information: Paraffin block will be returned with the final report.


If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-Oncology Test Request (T729)

-Immunohistochemical (IHC)/In Situ Hybridization (ISH) Stains Request (T763)

Specimen Stability Information

Specimen Type Temperature Time Special Container
Special Ambient (preferred)

Reference Values

Varies by tumor type; values reported from 0% to 100%

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
KINET Ki67 GI/Pancreas NET IHC Automated 29593-1


Result ID Test Result Name Result LOINC Value
71385 Interpretation 29593-1
71402 Participated in the Interpretation No LOINC Needed
71403 Report electronically signed by 19139-5
71404 Material Received 81178-6
71628 Disclaimer 62364-5
71842 Case Number 80398-1

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
KINM Ki67 GI/Pancreas NET IHC Manual No No

Testing Algorithm

Cases that are not able to be scanned for automated analysis will be changed to the manual process for analysis.

Mayo Clinic Laboratories | IHC Catalog Additional Information: