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Vogsen, Marianne; Naghavi-Behzad, Mohammad; Harbo, Frederik Graae; Jakobsen, Nick Møldrup; Gerke, Oke; Asmussen, Jon Thor; Nissen, Henriette Juel; Dahlsgaard-Wallenius, Sara Elisabeth; Braad, Poul-Erik; Jensen, Jeanette Dupont; Ewertz, Marianne; Hildebrandt, Malene Grubbe
Scientific reports, 04/2023, Letnik: 13, Številka: 1Journal Article
This study aimed to compare CE-CT and 2- FFDG-PET/CT for response monitoring metastatic breast cancer (MBC). The primary objective was to predict progression-free and disease-specific survival for responders vs. non-responders on CE-CT and 2- FFDG-PET/CT. The secondary objective was to assess agreement between response categorization for the two modalities. Treatment response in women with MBC was monitored prospectively by simultaneous CE-CT and 2- FFDG-PET/CT, allowing participants to serve as their own controls. The standardized response evaluation criteria in solid tumors (RECIST 1.1) and PET response criteria in solid tumors (PERCIST) were used for response categorization. For prediction of progression-free and disease-specific survival, treatment response was dichotomized into responders (partial and complete response) and non-responders (stable and progressive disease) at the first follow-up scan. Progression-free survival was defined as the time from baseline until disease progression or death from any cause. Disease-specific survival was defined as the time from baseline until breast cancer-specific death. Agreement between response categorization for both modalities was analyzed for all response categories and responders vs. non-responders. At the first follow-up, tumor response was reported more often by 2- FFDG-PET/CT than CE-CT, with only fair agreement on response categorization between the two modalities (weighted Kappa 0.28). Two-year progression-free survival for responders vs. non-responders by CE-CT was 54.2% vs. 46.0%, compared with 59.1% vs. 14.3% by 2- FFDG-PET/CT. Correspondingly, 2-year disease-specific survival were 83.3% vs. 77.8% for CE-CT and 84.6% vs. 61.9% for 2- FFDG-PET/CT. Tumor response on 2- FFDG-PET/CT was significantly associated with progression-free (HR: 3.49, P < 0.001) and disease-specific survival (HR 2.35, P = 0.008), while no association was found for tumor response on CE-CT. In conclusion, 2- FFDG-PET/CT appears a better predictor of progression-free and disease-specific survival than CE-CT when used to monitor metastatic breast cancer. In addition, we found low concordance between response categorization between the two modalities. Clinical. gov. NCT03358589. Registered 30/11/2017-Retrospectively registered, http://www. gov.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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