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Technology update

Jul 10, 2007

'Magnetic biopsies' better by design

Leukaemia treatment is often followed by a course of bone-marrow biopsies to check for the continued presence of malignant cells. The trouble is that the low concentration of target cells in individual biopsy samples can make it difficult to assess the status of disease. US researchers have now devised a way to improve the efficiency of this collection process by magnetizing the target cancer cells with nanoparticles and drawing out the labelled sample with a magnetic needle. They claim that their approach could remove the need for multiple biopsies at follow-up sessions.

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