Chemotherapy for metastatic colon cancer: No effect on survival when the dose is reduced due to side effects View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2018-04-23

AUTHORS

Stefan Munker, Michael Gerken, Petra Fest, Claudia Ott, Elisabeth Schnoy, Stefan Fichtner-Feigl, Philipp Wiggermann, Martin Vogelhuber, Wolfgang Herr, Christian Stroszczynski, Hans Jürgen Schlitt, Matthias Evert, Michael Reng, Monika Klinkhammer-Schalke, Andreas Teufel

ABSTRACT

BACKGROUND: 5-Fluorouracil (5FU), Folinic acid (FA), and Oxaliplatin (FOLFOX) or 5FU, FA, and Irinotecan (FOLFIRI) are standard regimens for palliative chemotherapy of metastatic colon cancer. Since data showing the influence of dose reduction in palliative treatment are rare, the objective of this single center, retrospective study was to further characterize the influence of dose reduction on efficacy of these therapeutic regimens. METHODS: One hundred nine patients, diagnosed with stage IV colon cancer between 2004 and 2012 and receiving palliative first-line chemotherapy with either FOLFOX or FOLFIRI regimens in our outpatient clinic were analyzed for treatment efficacy. Patients who received dose reductions due to side effects usually received doses of 80% or lower of per protocol dose. Survival data were obtained from the Regensburg Tumor Registry. Survival analysis was performed using Kaplan-Meier statistical analysis and multivariable analysis. RESULTS: A dose reduction due to side effects was necessary in 46 (42%) patients. Dose reduction was independent of age. Major reasons for dose reduction were neutropenia (30%) followed by polyneuropathy (16%) and diarrhea (14%). Dosage was more often reduced in patients receiving FOLFOX based therapy. Comparison of patients with dose reduction versus patients with full dosage showed no significant difference on overall survival (p = 0.430). Subgroup analysis revealed dose reduction in patients with N2 stage disease was associated with improved survival. Patients who underwent dose reduction received more cycles of chemotherapy (13.7 vs. 10.8 cycles) and cumulative dosage was similar in both groups. CONCLUSION: Contrary to our expectations, the need to reduce chemotherapy dosage due to side effects does not indicate a worse prognosis in our retrospective analysis. We believe this can in part be explained by better adaption to interindividual pharmacokinetics and longer time of treatment. More... »

PAGES

455

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s12885-018-4380-z

DOI

http://dx.doi.org/10.1186/s12885-018-4380-z

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1103602067

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/29685155


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29 schema:description BACKGROUND: 5-Fluorouracil (5FU), Folinic acid (FA), and Oxaliplatin (FOLFOX) or 5FU, FA, and Irinotecan (FOLFIRI) are standard regimens for palliative chemotherapy of metastatic colon cancer. Since data showing the influence of dose reduction in palliative treatment are rare, the objective of this single center, retrospective study was to further characterize the influence of dose reduction on efficacy of these therapeutic regimens. METHODS: One hundred nine patients, diagnosed with stage IV colon cancer between 2004 and 2012 and receiving palliative first-line chemotherapy with either FOLFOX or FOLFIRI regimens in our outpatient clinic were analyzed for treatment efficacy. Patients who received dose reductions due to side effects usually received doses of 80% or lower of per protocol dose. Survival data were obtained from the Regensburg Tumor Registry. Survival analysis was performed using Kaplan-Meier statistical analysis and multivariable analysis. RESULTS: A dose reduction due to side effects was necessary in 46 (42%) patients. Dose reduction was independent of age. Major reasons for dose reduction were neutropenia (30%) followed by polyneuropathy (16%) and diarrhea (14%). Dosage was more often reduced in patients receiving FOLFOX based therapy. Comparison of patients with dose reduction versus patients with full dosage showed no significant difference on overall survival (p = 0.430). Subgroup analysis revealed dose reduction in patients with N2 stage disease was associated with improved survival. Patients who underwent dose reduction received more cycles of chemotherapy (13.7 vs. 10.8 cycles) and cumulative dosage was similar in both groups. CONCLUSION: Contrary to our expectations, the need to reduce chemotherapy dosage due to side effects does not indicate a worse prognosis in our retrospective analysis. We believe this can in part be explained by better adaption to interindividual pharmacokinetics and longer time of treatment.
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52 clinic
53 colon cancer
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65 doses
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68 expectations
69 first-line chemotherapy
70 folinic acid
71 full dosage
72 group
73 improved survival
74 influence
75 interindividual pharmacokinetics
76 irinotecan
77 long time
78 major reason
79 metastatic colon cancer
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81 multivariable analysis
82 need
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85 outpatient clinic
86 overall survival
87 oxaliplatin
88 palliative chemotherapy
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91 part
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93 pharmacokinetics
94 polyneuropathy
95 prognosis
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97 reasons
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105 single center
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