Ever heard the one about the dog that could sniff out cancers? Well, the story could have a basis in fact. Scientists revealed yesterday how odours from the skin could be used to detect certain tumours. Human skin emits hundreds of chemicals known as volatile organic compounds, many of which are odorous. By comparing the chemicals released by the skin of healthy volunteers to those with basal cell carcinoma, the most common form of skin cancer, scientists were able to characterise the "smell" of the tumours.
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Machine 'sniffs out skin cancer' - BBC Health News 21st August 2008
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