Metastasis is the leading cause of death in cancer, occurring when a cell leaves the primary tumour, passes into the bloodstream and lymphatic system and reaches distant organs. Non-invasive collection of these circulating tumour cells is essential for the study of cell biology, the diagnosis and prognosis in cancer research, and drug development. As a general rule, the concentration of cancer cells found in blood is very small with respect to other cell types, and traditional methods of collecting them in a viable way are laborious.

https://www.miragenews.com/smart-bioelectronic-devices-trap-and-release-1080785/

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