Microsatellite Instability by NGS - MSI

Microsatellite instability testing is used to identify tumors caused by defective MMR by
comparing the number of nucleotide repeats in a panel of microsatellite markers in normal tissue with the
the number of tumor tissue from the same individual.
Microsatellite instability (MSI) is present if the number of repeats in the tumor and the normal tissue
differs.