Immunohistochemical mismatch repair proteins expression in colorectal cancer

Anna Maria Valentini, Raffaele Armentano, Michele Pirrelli, Mattia Gentile, Maria Lucia Caruso

Research output: Contribution to journalArticlepeer-review


Immunohistochemical (IHC) assessment of the mismatch repair proteins has been proposed as an alternative strategy to molecular biology for evaluating the unstable phenotype of tumors. With the aim of introducing IHC analysis as a routine diagnostic test, the authors compared the expression of MLH1 and MSH2 proteins with a PCR-based microsatellite assay. The concordance rate between the two methods was 90% after IHC evaluation of two different areas of each tumor. These results show that IHC may be as efficient as PCR in detecting unstable phenotype by using only one surgical or biopsy sample.

Original languageEnglish
Pages (from-to)42-45
Number of pages4
JournalApplied Immunohistochemistry and Molecular Morphology
Issue number1
Publication statusPublished - Mar 2006


  • Mismatch repair protein
  • MLH1
  • MSH2

ASJC Scopus subject areas

  • Anatomy
  • Medical Laboratory Technology


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