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Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging 2/2021

19.08.2020 | Original Article

2-[18F]FDG PET/CT parameters associated with WHO/ISUP grade in clear cell renal cell carcinoma

verfasst von: Yanyan Zhao, Caixia Wu, Wei Li, Xueqi Chen, Ziao Li, Xuhe Liao, Yonggang Cui, Guangyu Zhao, Meng Liu, Zhanli Fu

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 2/2021

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Abstract

Purpose

To explore the potential parameters from preoperative 2-[18F]FDG PET/CT that might associate with the World Health Organization/the International Society of Urological Pathology (WHO/ISUP) grade in clear cell renal cell carcinoma (ccRCC).

Methods

One hundred twenty-five patients with newly diagnosed ccRCC who underwent 2-[18F]FDG PET/CT prior to surgery or biopsy were retrospectively reviewed. The metabolic parameters and imaging features obtained from 2-[18F]FDG PET/CT examinations were analyzed in combination with clinical characteristics. Univariate and multivariate logistic regression analyses were performed to identify the predictive factors of WHO/ISUP grade.

Results

Metabolic parameters of primary tumor maximum standardized uptake value (SUVmax), tumor-to-liver SUV ratio (TLR), and tumor-to-kidney SUV ratio (TKR) were significantly different between any two of the four different WHO/ISUP grades, except those between the WHO/ISUP grade 3 and grade 4. The optimal cutoff values to predict high WHO/ISUP grade for SUVmax, TLR, and TKR were 4.15, 1.63, and 1.59, respectively. TLR (AUC: 0.841) was superior to TKR (AUC: 0.810) in distinguishing high and low WHO/ISUP grades (P = 0.0042). In univariate analysis, SUVmax, TLR, TKR, primary tumor size, tumor thrombus, distant metastases, and clinical symptoms could discriminate between the high and low WHO/ISUP grades (P < 0.05). In multivariate analysis, TLR (P < 0.001; OR: 1.732; 95%CI: 1.289–2.328) and tumor thrombus (P < 0.001; OR: 6.199; 95%CI: 2.499–15.375) were significant factors for differentiating WHO/ISUP grades.

Conclusion

Elevated TLR (> 1.63) and presence of tumor thrombus from preoperative 2-[18F]FDG PET/CT can distinguish high WHO/ISUP grade ccRCC effectively. 2-[18F]FDG PET/CT may be a feasible method for noninvasive assessment of WHO/ISUP grade.
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Metadaten
Titel
2-[18F]FDG PET/CT parameters associated with WHO/ISUP grade in clear cell renal cell carcinoma
verfasst von
Yanyan Zhao
Caixia Wu
Wei Li
Xueqi Chen
Ziao Li
Xuhe Liao
Yonggang Cui
Guangyu Zhao
Meng Liu
Zhanli Fu
Publikationsdatum
19.08.2020
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 2/2021
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-020-04996-4

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