I worked at a mouse lab that studied cancer genes and the cancers defineatly have a certain smell not unlike the OP describes. Not to be crude but I
can also often smell when it's that time of the month for many women, given the right conditions such as not too many competeing scents. Just a
smell, not good or bad.
My cat has an uncanny sense of pain in humans. He will zero in on the pain spot and lick it. He has to be comfortable with the person first.
If only we would focus our energies on positive outlets rather than constantly competing to beat each other.


oh I
kid... But they could help you quantify your findings and write you up in a report or something... Maybe it's very specific types of cancer. 
