Compliments of Ray Hammond who alerted me to this cool Startup!   A device developed in Israel called the “NaNose” is claimed to be able to detect cancer and other illness simply by sampling human breath.
NaNose is now being ported to be available on a smartphone as an add-on called “The Sniff Phone”.
By identifying the special “odour” emitted by cancer cells, it is claimed the NaNose system can detect the presence of tumours, both benign and malignant, more quickly, efficiently and cheaply than previously possible.

It is claimed the system is 90 per cent accurate.