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Microsatellite instability has a positive prognostic impact on stage II colorectal cancer after complete resection: results from a large, consecutive Norwegian series

Open access
Merok, M.A., Ahlquist, T., Røyrvik, E.C., Tufteland, K.F., Hektoen, M., Sjo, O.H., Mala, T., Svindland, A., Lothe, R.A., Nesbakken, A.·2013·Annals of Oncology

Abstract

BACKGROUND: Microsatellite instability (MSI) was suggested as a marker for good prognosis in colorectal cancer in 1993 and a systematic review from 2005 and a meta-analysis from 2010 support the initial observation. We here assess the prognostic impact and prevalence of MSI in different stages in a consecutive, population-based series from a single hospital in Oslo, Norway. PATIENTS AND METHODS: Of 1274 patients, 952 underwent major resection of which 805 were included in analyses of MSI prevalence and 613 with complete resection in analyses of outcome. Formalin-fixed tumor tissue was used for PCR-based MSI analyses. RESULTS: The overall prevalence of MSI was 14%, highest in females (19%) and in proximal colon cancer (29%). Five-year relapse-free survival (5-year RFS) was 67% and 55% (P = 0.030) in patients with MSI and MSS tumors, respectively, with the hazard ratio (HR) equal to 1.60 (P = 0.045) in multivariate analysis. The improved outcome was confined to stage II patients who had 5-year RFS of 74% and 56% respectively (P = 0.010), HR = 2.02 (P = 0.040). Examination of 12 or more lymph nodes was significantly associated with proximal tumor location (P < 0.001). CONCLUSIONS: MSI has an independent positive prognostic impact on stage II colorectal cancer patients after complete resection.

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Metadata

Authors
Merok, M. A., Ahlquist, T., Røyrvik, E. C., Tufteland, K. F., Hektoen, M., Sjo, O. H., Mala, T., Svindland, A., Lothe, R. A., & Nesbakken, A.
Venue
Annals of Oncology
Publisher
Elsevier BV
Published
2013-05
Volume
24
Issue
5
Pages
1274-1282
ISSN
0923-7534 (ISSN-L)
OpenAlex
W2042498810
Cited by
190
References
1
FWCI
10.18
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Microsatellite instability has a positive prognostic impact on stage II colorectal cancer after complete resection: results from a large, consecutive Norwegian series. https://app.cochat.ai/papers/10.1093/annonc/mds614
The paper
Merok, M. A., Ahlquist, T., Røyrvik, E. C., Tufteland, K. F., Hektoen, M., Sjo, O. H., Mala, T., Svindland, A., Lothe, R. A., & Nesbakken, A. (2013). Microsatellite instability has a positive prognostic impact on stage II colorectal cancer after complete resection: results from a large, consecutive Norwegian series. Annals of Oncology. https://doi.org/10.1093/annonc/mds614

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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