I know the USA developed a chip to determine one cancer cell in a million within the blood. They used a medical needle to extract the cancer fluid for detection purposes. I wanted to query if there was a way to extract nerve and cancer cells. Might be a substance the cancer cells can attach to, I do know Nanopartz in the US used particles which attach to cancer cell ligands, myself I am not sure of its applicability to all cancers and I read the cancer cells can be so small they bypass the particles?