Dogs Find Prostate Cancer by Smell April 20, 2015 -- Scientists in Italy say they have trained two dogs to “sniff out” prostate cancer with more than 90% accuracy.

The researchers say using dogs to diagnose the disease could provide an alternative to the current blood test for prostate-specific antigen (PSA), which can give false results in men who do not have prostate cancer.

The team, led by the Humanitas Clinical and Research Center in Milan, Italy, collected urine samples from 362 men diagnosed with prostate cancer at different stages of the disease. They also took samples from 418 men and 122 women who were either healthy, had a different type of cancer, or had another health condition.

A Visual Guide to Prostate Cancer