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. 2021 Jun 23;11:646338. doi: 10.3389/fonc.2021.646338

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Copyright © 2021 Niu, Liu, Xu, Peng, Yu, Huang, Wu, Cui, Huang, Ma, Zhang and Wang

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Images of VTT and the renal mass pre- (left) or post-immunotherapy (right) of two ccRCC patients with VTT. VTT, venous tumor thrombus; ccRCC, clear cell renal cell carcinoma.