Oesophageal cancer

For several years Professor George Hanna, from Imperial College London, has been directing work toward the development of a test that can detect cancers of the esophagus and stomach by measuring the levels of five chemicals in a patient's breath.

Billed as "a pill on a string," the Cytosponge is designed to scrape off cells from the length of the oesophagus as it is yanked out after swallowing, offering up a larger sample for inspection for signs of cancer.