Test Name
MISMATCH REPAIR (MMR) PROTEIN IMMUNOHISTOCHEMISTRY
Aliases
MMR IHC
Abbreviations
-
Test Classification
INDIVIDUAL
Department
ANATOMIC PATHOLOGY
Sub Department
HISTOLOGY
TAT Category
ELAPSED (CONTINUOUS) TIME
Estimated TAT
14
TAT Units
DAYS
Test Requirements
Formalin fixed, paraffin embedded blocks. Residual tissue with tumor must be available on the block.
Transport at room temperature (20-25 degrees C); protect from excessive heat.
Clinical history and original H&E report are required.
Clinical Utility
Evaluation/ Screening Of Lynch Syndrome Or Hereditary Non-polyposis Colorectal Cancer (HNPCC). Positive results require follow up microsatellite instability (MSI testing For quantification in order to distinguish between high & low MSI. High MSI is associated with poorer prognosis.
Last Review
26th Feb 2026