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Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging 2/2023

12.10.2022 | Original Article

Prognostic value of fibroblast activation protein expressing tumor volume calculated from [68 Ga]Ga-FAPI PET/CT in patients with esophageal squamous cell carcinoma

verfasst von: Liang Zhao, Yizhen Pang, Shanyu Chen, Jianhao Chen, Yimin Li, Yifeng Yu, Chunbin Huang, Long Sun, Hua Wu, Haojun Chen, Qin Lin

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 2/2023

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Abstract

Background

This study aimed to investigate the prognostic value of semiquantitative parameters derived from [68 Ga]Ga-fibroblast activation protein inhibitor (FAPI) PET/CT for patients with esophageal squamous cell carcinoma (ESCC) treated with definitive chemoradiotherapy.

Methods

We conducted a retrospective analysis on patients from a prospective parent study (NCT04416165). A total of 45 patients with locally advanced ESCC who underwent [68 Ga]Ga-FAPI from December 2019 to March 2021 were included. The maximum standard uptake value (SUVmax), gross tumor volume (GTV), and total lesion-FAPI (TL-FAPI) of the primary tumor were calculated from the corresponding PET/CT image. Unpaired parameters were compared using Student’s t test or the Mann–Whitney U test. Paired parameters were compared using the paired t test or the Wilcoxon matched-pairs signed-rank test. Kaplan–Meier curves were generated to calculate progression-free survival (PFS) and overall survival (OS) rates, and Cox regression analysis was performed to determine which PET/CT parameters were prognostic factors for PFS and/or OS.

Results

Thirty-four of the 45 patients met the criteria, and the median follow-up time was 24 months (16–29 months). SUVmax-FAPI, GTVFAPI, and TL-FAPI in patients with stage T4 tumors were significantly higher than those in patients with stage T2/T3 tumors (all P < 0.01). In the univariate Cox regression analysis, T stage, N stage, GTVFAPI, and TL-FAPI were associated with PFS, and T stage, GTVFAPI, and TL-FAPI were associated with OS. Upon multivariable analysis, GTVFAPI was an independent prognostic factor for both PFS (hazard ratio (HR), 5.76; 95% confidence interval (CI), 2.13–15.57, P = 0.001) and OS (HR, 4.96; 95% CI, 2.55–18.79, P = 0.001).

Conclusion

This pilot study revealed that [68 Ga]Ga-FAPI PET/CT may have prognostic value for patients with ESCC treated with definitive chemoradiotherapy. It may aid in personalized patient management by steering treatment modifications before therapy. Prospective studies with larger samples and longer observation periods are needed.
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Metadaten
Titel
Prognostic value of fibroblast activation protein expressing tumor volume calculated from [68 Ga]Ga-FAPI PET/CT in patients with esophageal squamous cell carcinoma
verfasst von
Liang Zhao
Yizhen Pang
Shanyu Chen
Jianhao Chen
Yimin Li
Yifeng Yu
Chunbin Huang
Long Sun
Hua Wu
Haojun Chen
Qin Lin
Publikationsdatum
12.10.2022
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 2/2023
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-022-05989-1

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