Figure 1.

Summary of circulating tumour cell (CTC) enrichment technologies. (A) Immunocapture methods including immunomagnetic positive and negative enrichment methods, microfluidic immunocapture methods, nanomaterial immunocapture enhancement and their relevant technologies; (B) Biophysical property enrichment methods including membrane filtration, size-based microfluidics, density based and dielectrophoresis and associated technologies; (C) Other methods including in vitro, combined and secondary isolation methods and associated technologies.