Dogs Sniff Out Early-Stage Human Cancer - Yahoo! News

Scientists have shown previously that dogs seem able to sniff out cancer. A 2004 study in the British Medical Journal found dogs could detect bladder cancer by sniffing human urine. And in a small study in 2006 reported in the journal Integrative Cancer Therapies, dogs were trained to identify lung or breast cancer.
In the new study, researchers trained dogs to distinguish different types and grades of ovarian cancer, including borderline tumors. Turns out the odor of ovarian cancer does seem to differ from those of other gynecological malignancies, such as cervical, or endometrial cancers.