High frequency microsatellite instability has a prognostic value in endometrial endometrioid adenocarcinoma, but only in FIGO stage 1 cases

Anita Steinbakk, Anais Malpica, Aida Slewa, Einar Gudlaugsson, Emiel A. M. Janssen, Mark P. Arends, Arnold-Jan Kruse, Yu Yinhua, Weiwei Feng, Jan P. A. Baak*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


To analyze the prognostic value of microsatellite instability (MSI) in a population-based study of FIGO stage 1-4 endometrial endometrioid adenocarcinomas.Survival analysis in 273 patients of MSI status and clinico-pathologic features. Using a highly sensitive pentaplex polymerase chain reaction to establish MSI status, cases were divided into microsatellite stable (MSS), MSI-low (MSI-L, 1 marker positive) and MSI-high (MSI-H, 2-5 markers positive).After 61 months median follow-up (1-209), 34 (12.5%) of the patients developed metastases but only 6.4% of the FIGO-1. MSI (especially as MSI-H versus MSS/MSI-Lcombined) was prognostic in FIGO-1 but not in FIGO2-4. The 5 and 10 year recurrence-free survival rates were 98% and 95% in the MSS/MSI-L versus 85% and 73% in the MSI-H patients (P?=?0.005).MSI-H status assessed by pentaplex polymerase chain reaction is an indicator of poor prognosis in FIGO 1, but not in FIGO 2-4 endometrial endometrioid adenocarcinomas.
Original languageEnglish
Pages (from-to)457-465
JournalCellular oncology
Issue number5
Publication statusPublished - Oct 2011


  • Endometrial cancer
  • Endometrioid
  • FIGO stage 1
  • MSI
  • Prognosis

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