Test ID: IHCO
Mismatch Repair (MMR) Protein Immunohistochemistry Only, Tumor
Secondary ID 
A test code used for billing and in test definitions created prior to November 2011
29004
NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.
Yes
Useful For Suggests clinical disorders or settings where the test may be helpful
Evaluation of tumor tissue to identify patients at risk for having hereditary nonpolyposis colon cancer/Lynch syndrome
Note: Mayo's preferred screening test, HNPCC/17073 Hereditary Nonpolyposis Colorectal Cancer (HNPCC) Screen, includes both microsatellite instability and immunohistochemistry testing.
Additional Tests Lists test(s) that are always performed, at an additional charge, with the initial test(s)
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| MLH1B | MLH-1, Immunostain | No, (bill only) | Yes |
| MSH2B | MSH-2, Immunostain | No, (bill only) | Yes |
| MSH6B | MSH-6, Immunostain | No, (bill only) | Yes |
| PMS2B | PMS-2, Immunostain | No, (bill only) | Yes |
Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.
When this test is ordered, MLH1, MSH2, MSH6, and PMS2 stains will always be performed at an additional charge.
Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test
Method Name A short description of the method used to perform the test
Immunohistochemical Staining for MLH1, MSH2, MSH6, and PMS2
Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name
MMR Protein, IHC Only, Tumor
Aliases Lists additional common names for a test, as an aid in searching
Hereditary Nonpolyposis Colorectal Cancer (HNPCC)
Lynch syndrome
Mismatch Repair (MMR) Protein Immunohistochemistry
Immunohistochemistry (IHC)
HNPCC testing
Lynch syndrome
Mismatch Repair (MMR) Protein Immunohistochemistry
Immunohistochemistry (IHC)
HNPCC testing
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