Cellulose-based magnetic nanocrystals and nanofibres can capture circulating tumour cells (CTCs) from the blood samples of head and neck cancer patients. A magnet is used to separate the trapped tumour cells, which are then identified under a fluorescence microscope.

This technique could potentially be used to monitor cancer progression in real time, says an international team, which included researchers at North Dakota State University, USA, the Tata Memorial Hospital in Mumbai, and Actorius Innovations and Research, and Dr. Vishwanath Karad MIT World Peace University, both in Pune.

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