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037 _ _ |a DKFZ-2019-02967
041 _ _ |a eng
082 _ _ |a 610
100 1 _ |a Alwers, Elizabeth
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245 _ _ |a Microsatellite instability and survival after adjuvant chemotherapy among stage II and III colon cancer patients: results from a population-based study.
260 _ _ |a Hoboken, NJ
|c 2020
|b John Wiley & Sons, Inc.
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500 _ _ |a #EA:C070#LA:C070# 14 (2), 363-372Feb 2020
520 _ _ |a Previous studies have reported conflicting results regarding the benefit of administering 5-FU based chemotherapy to colon cancer patients with microsatellite instable (MSI-high) tumors, and results from stage-specific analyses are scarce. Patients with stage II or III colon cancer were recruited as part of a population-based study between 2003 and 2015. Cox regression models including propensity-score weighting were used to calculate hazard ratios and confidence intervals for the association between chemotherapy and cancer-specific (CSS), relapse-free (RFS) and overall survival (OS) by stage of disease and MSI status of the tumor. Median follow-up was 6.2 years. A total of 1010 colon cancer patients were included in the analysis (54% stage II, 46% stage III, 20% MSI-high). Adjuvant chemotherapy was administered to 48 (8.7%) stage II and 366 (79%) stage III patients. Overall, patients who received adjuvant chemotherapy had better CSS (HR = 0.65[0.49-0.86]) than those who received surgery alone. Among stage II patients, only 64 (12%) cancer-related deaths occurred, none of which in MSI-high patients who received chemotherapy. Patients with MSI-high tumors who received adjuvant treatment showed better CSS and a tendency towards better RFS compared to MSI-high patients who did not receive chemotherapy (HRCSS  = 0.36[0.15-0.82], HRRFS  = 0.49[0.22-1.06]). Patients with microsatellite stable (MSS) tumors receiving adjuvant chemotherapy also had significantly better survival (HRCSS  = 0.65[0.48-0.87] and HRRFS  = 0.68[0.52-0.88]). In this population-based study including stage II and III colon cancer patients, we observed a survival benefit of adjuvant chemotherapy for both MSS and MSI-high tumors. Adjuvant chemotherapy seemed to be beneficial among high-risk stage II patients with MSI-high tumors.
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700 1 _ |a Jansen, Lina
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700 1 _ |a Bläker, Hendrik
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700 1 _ |a Kloor, Matthias
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700 1 _ |a Tagscherer, Katrin E
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700 1 _ |a Roth, Wilfried
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700 1 _ |a Boakye, Daniel
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700 1 _ |a Herpel, Esther
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700 1 _ |a Grüllich, Carsten
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700 1 _ |a Chang-Claude, Jenny
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700 1 _ |a Brenner, Hermann
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700 1 _ |a Hoffmeister, Michael
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773 _ _ |a 10.1002/1878-0261.12611
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