Table 2

Comparing MSIa and IHC staining results

MSINormal expression≥1 MMR protein absentConcordance
MSI-H129188%
MSS136696%
MSI-Lm2011
MSI-Ld71
  • a MSI, microsatellite instability; IHC, immunohistochemistry; MMR, mismatch repair; MSS, microsatellite stability; MSI-Lm, MSI-L with instability of only a mononucleotide marker; MSI-Ld, MSI-L with instability of only a dinucleotide marker.