Can Dogs Detect Cancer?

Does cancer have a smell? I wouldn't think so but apparently the most sensitive noses in the world -- those belonging to dogs -- can detect the presence of cancer with alarming accuracy, according to thatsfit.com. Dogs were 99% accurate at detecting lung cancer and 88% accurate at detecting breast cancer, regardless of attempts to mask the smell through food or cigarettes.

Apparently, tumors give out small amounts of alkanes and benzene, which have a slight odor, and once a dog is trained to pick up that smell, it has a good chance of detecting it in the future.

Is that amazing or what?