Please read

Cheng, J., Liu, Y., Zhao, Y., Zhang, L., Zhang, L., Mao, H., & Huang, C. (2020). Nanotechnology-assisted isolation and analysis of circulating tumor cells on microfluidic devices. Micromachines, 11(8), 774.

and

Iyer, A., Gupta, K., Sharma, S., Hari, K., Lee, Y. F., Ramalingam, N., ... & Sengupta, D. (2020). Integrative analysis and machine learning based characterization of single circulating tumor cells. Journal of clinical medicine, 9(4), 1206.

and

Luo, L., & He, Y. (2020). Magnetically driven microfluidics for isolation of circulating tumor cells. Cancer medicine, 9(12), 4207-4231.

Liquid biopsy techniques can provide real-time information regarding patient staging (metastatic vs. nonmetastatic) and the molecular profile of the tumor. Moreover, liquid biopsies can be repeated with the desired frequency for close monitoring of progress and treatment