Dogs Excel on Smell Test to Find Cancer

Man's best friend comes to the rescue one more time!
Three Labradors and two Portuguese water dogs have been trained to detect human lung cancer by sniffing the breath of patients diagnosed with cancer. The researchers working at a Northern Californian clinic have found the accuracy to be ninety-nine percent. Tumors are known to secrete small amounts of alkanes and benzene byproducts. These dogs are doing double duty. They are borrowed from the Guide Dogs for the Blind organization and they are rewarded whenever they detect the correct scent from a variety of smelling pots. This research supports the fact that the breath of lung cancer patients differs significantly from a healthy human's breath.