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Changes in 18F-fluorothymidine and 18F-fluorodeoxyglucose positron emission tomography imaging in patients with head and neck cancer treated with chemoradiotherapy

Annals of Nuclear Medicine volume 27, pages 363–370 (2013)Cite this article

Abstract

Objective

This study compared change of 18F-fluorothymidine (FLT) uptake with that of 18F-fluorodeoxyglucose (FDG) in head and neck squamous cell cancer (HNSCC) patients during and after treatment and evaluated the utility for early monitoring of response to chemoradiotherapy.

Methods

Thirty patients with newly diagnosed HNSCCs treated with concurrent chemoradiotherapy underwent FLT and FDG PET in pre-treatment (PET1), mid-treatment (PET2) and post-treatment (PET3) stages. The PET images were evaluated quantitatively using maximum standardized uptake values (SUVs). Ratios between SUVs at PET2 and PET3 were also calculated.

Results

According to the SUVs, no significant differences were found with primary site location, cellular differentiation and T category in all PET scans. About a 78 % median decrease in FLT SUV was observed at the total dose (TD) of 30 Gy and no apparent change was observed thereafter. About a 40 % decrease in FDG SUV was observed at TD 30 Gy and significant decreases were then found at the 4- and 6-week time points after the therapy. FLT PET demonstrated no recurrence regions in patients with a PET3/PET2 ratio of <1.5. In comparison, FLT SUVs in PET3 with recurrence were increased more than three times. However, no significant difference was found between the values with recurrence and those with no recurrence in FDG PET.

Conclusion

FLT PET signal change preceded FDG PET change and the increase of FLT uptake after the therapy can imply recurrence or a residual tumor. FLT PET seems promising for early evaluation of chemoradiation effects in HNSCCs.

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Conflict of interest

The authors have no conflicts of interest to declare.

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Affiliations

  1. Department of Otolaryngology, Faculty of Medicine, Kagawa University, 1750-1, Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan

    Hiroshi Hoshikawa, Terushige Mori, Takehito Kishino, Ryuhei Inamoto, Kosuke Akiyama & Nozomu Mori

  2. Department of Radiology, Faculty of Medicine, Kagawa University, 1750-1, Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan

    Yuka Yamamoto & Yoshihiro Nishiyama

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  1. Hiroshi Hoshikawa
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  2. Terushige Mori
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  3. Takehito Kishino
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Correspondence to Hiroshi Hoshikawa.

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Hoshikawa, H., Mori, T., Kishino, T. et al. Changes in 18F-fluorothymidine and 18F-fluorodeoxyglucose positron emission tomography imaging in patients with head and neck cancer treated with chemoradiotherapy. Ann Nucl Med 27, 363–370 (2013). https://doi.org/10.1007/s12149-013-0694-8

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  • DOI: https://doi.org/10.1007/s12149-013-0694-8

Keywords

  • FLT PET
  • FDG PET
  • SUVs
  • Chemoradiation
  • Early prediction