Abstract
Objectives
We studied the usefulness of early dynamic (ED) and whole-body (WB) FDG-PET/CT for the evaluation of renal cell carcinoma (RCC).
Methods
One hundred patients with 107 tumours underwent kidney ED and WB FDG-PET/CT. We visually and semiquantitatively evaluated the FDG accumulation in RCCs in the ED and WB phases, and compared the accumulation values with regard to histological type (clear cell carcinoma [CCC] vs. non-clear cell carcinoma [N-CCC]), the TNM stage (high stage [3–4] vs. low stage [1–2]), the Fuhrman grade (high grade [3–4] vs. low grade [1–2]) and presence versus absence of venous (V) and lymphatic (Ly) invasion.
Results
In the ED phase, visual evaluation revealed no significant differences in FDG accumulation in terms of each item. However, the maximum standardized uptake value and tumour-to-normal tissue ratios were significantly higher in the CCCs compared to the N-CCCs (p < 0.001). In the WB phase, in contrast, significantly higher FDG accumulation (p < 0.001) was found in RCCs with a higher TNM stage, higher Furman grade, and the presence of V and Ly invasion in both the visual and the semiquantitative evaluations.
Conclusions
ED and WB FDG-PET/CT is a useful tool for the evaluation of RCCs.
Key Points
• ED and WB FDG-PET/ CT helps to assess patients with RCC
• ED FDG-PET/CT enabled differentiation between CCC and N-CCC
• FDG accumulation in the WB phase reflects tumour aggressiveness
• Management of RCC is improved by ED and WB FDG-PET/CT
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Acknowledgments
The scientific guarantor of this publication is Shuji Sakai. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. The authors state that this work has not received any funding. Drs. Shigeo Kamitsuji and Naoyuki Kamatani, StaGen Co. Ltd., kindly provided statistical advice for this manuscript, for which the authors are very grateful. Institutional Review Board approval was obtained. Written informed consent was obtained from all subjects (patients) in this study. Methodology: prospective, diagnostic study, performed at one institution. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
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Nakajima, R., Abe, K., Kondo, T. et al. Clinical role of early dynamic FDG-PET/CT for the evaluation of renal cell carcinoma. Eur Radiol 26, 1852–1862 (2016). https://doi.org/10.1007/s00330-015-4026-3
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DOI: https://doi.org/10.1007/s00330-015-4026-3