Light is a "promising" tool in the fight against cancer, say researchers in the US.
A study, published in Nature Medicine, showed how a drug could be created which sticks to tumours, but is then only activated when hit by specific waves of light.
In this study, researchers at the National Cancer Institute, Maryland, used an antibody which targets proteins on the surface of cancerous cells. They then attached a chemical, IR700, to the antibody. IR700 is activated when it is hit by near infrared light. This wavelength of light can penetrate several centimetres into the skin.Link: BBC News - Light 'promising' in cancer fight
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