Impact of third-line treatment with irinotecan plus cetuximab on non-tumor standardized uptake values in patients with metastatic colorectal cancer

  • Andersen K
  • Skougaard K
  • Nielsen A
 et al. 
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The correct interpretation of metabolic response in cancer cells to therapy requires knowledge of how tumor-free tissue responds to the same treatment. The aim of this study was to evaluate standardized uptake values (SUVs) in tumor-free regions of patients with metastatic colorectal cancer prior to and following therapy, via the use of 18-fluoride fluoro-2-deoxy-D-glucose (18F-FDG) positron emission tomography/computed tomography (PET/CT). On baseline 18F-FDG PET/CT scans (n=51), volumes of interest (VOI) were obtained from tumor-free tissue (aortic arch, liver and spleen) and SUVs normalized to total body mass were registered. The procedure was repeated for a follow-up scan two weeks following a single administration of the third-line treatment with irinotecan plus cetuximab. The mean differences in SUV prior to and following therapy were non-significant (P>0.05) in all the registered tumor-free regions. Correlation coefficients indicated a significant result between the variables (0.74-0.84; P

Author-supplied keywords

  • Early assessment
  • Metabolic response
  • Metastatic colorectal cancer
  • Non-tumor tissue
  • Standardized uptake values

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  • Kim Francis Andersen

  • Kristin Skougaard

  • Anne Lerberg Nielsen

  • Helle Westergren Hendel

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