Interesting
RB
http://www.newscientist.com/article.ns?id=dn8549
Abstract
.....To test how well the
dogs had learned, they used a new batch of samples and had the
dogs attempt to distinguish among 55 lung
cancer patients, 31
breast cancer patients and 83 healthy controls. The patients had all had their cancers confirmed by biopsy. The tests were double-blind, so neither the dog handlers nor the experimenters knew which tubes were which.......
.......The
dogs correctly detected 99% of the lung
cancer samples, and made a mistake with only 1% of the healthy controls. With
breast cancer, they correctly detected 88% of the positive samples, and made a mistake on only 2% of the controls.
The work is convincing, says James C Walker, director of the Florida State University Sensory Research Institute in Tallahassee, US. In 2004 Walker and colleagues showed that
dogs could
sniff out melanomas. He says that the next step is to see if
dogs are really detecting
cancer, or if they might be sensing a more general disease symptom, such as one that comes from inflammation.
Walker says he would like, eventually, to see a long, large-scale trial designed to test whether
dogs can detect
cancer even earlier than standard screening tests.