In some cases, screening may be able to detect even a pre-cancer development. Colorectal cancer is an example of a well-studied cancer that can be detected even before the actual disease develops. The faecal immunochemical test is a preliminary cancer screening test that detects the presence of small amounts of blood in stools. For women, more than three quarters of them (77 per cent) with breast cancer are diagnosed early, whereas only 37 per cent of stomach cancer is