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. 2021 Oct 29;13(21):5429. doi: 10.3390/cancers13215429

Figure 1.

Figure 1

Liquid biopsy. Distant from the original brain tumor, samples from blood and cerebrospinal fluid (CSF) can typically serve as a low-risk source of tumor-derived nucleic acids (RNA, DNA) for further analysis. CSF—cerebrospinal fluid; EV—extracellular vesicle; CTC—circulating tumor cell. Created/modified with https://smart.servier.com (accessed on 8 August 2021), licensed under Creative Commons Attribution 3.0 Unported License (https://creativecommons.org/licenses/by/3.0/ (accessed on 8 August 2021)).