Correlation between germline mutations in MMR genes and microsatellite instability in ovarian cancer specimens.

Published

Journal Article

A high proportion of ovarian cancers from women who carry germline mutations in mismatch repair (MMR) genes demonstrate microsatellite instability (MSI). The utility of pre-screening ovarian cancer specimens for MSI to identify potential patients for germline screening for MMR mutations is uncertain. 656 women with malignant ovarian cancer underwent both MSI testing and germline mutation testing for large rearrangements in three MMR genes, MLH1, MSH2 and MSH6. Germline DNA sequencing data for the same genes was available. Among the 656 women, only four (0.6%) carried a clearly pathogenic MMR mutation. All four cancers from patients with mutations had loss of two or more microsatellite markers (MSI-high). Eighty-four of 652 (13.0%) women without a mutation had MSI-high ovarian cancers. Using MSI-high as a prescreening criterion, the sensitivity of MSI testing to identify germline MMR gene mutations was 100% and the positive predictive value was 4.5%. Germline mutations in MLH1, MSH2 and MSH6 are rare among unselected cases of ovarian cancer. Patients with germline mutations often will have MSI-positive cancers and pre-screening of ovarian cancer specimens may be an efficient way of identifying patients with Lynch syndrome.

Full Text

Duke Authors

Cited Authors

  • Akbari, MR; Zhang, S; Cragun, D; Lee, J-H; Coppola, D; McLaughlin, J; Risch, HA; Rosen, B; Shaw, P; Sellers, TA; Schildkraut, J; Narod, SA; Pal, T

Published Date

  • July 2017

Published In

Volume / Issue

  • 16 / 3

Start / End Page

  • 351 - 355

PubMed ID

  • 28176205

Pubmed Central ID

  • 28176205

Electronic International Standard Serial Number (EISSN)

  • 1573-7292

International Standard Serial Number (ISSN)

  • 1389-9600

Digital Object Identifier (DOI)

  • 10.1007/s10689-017-9973-1

Language

  • eng