Anne Li March 11th, 2018
Not all cancers are equal. Some grow fast and spread quickly, while others grow so slowly (or even not at all) that if they went undetected they wouldn’t cause any problems. Even if left untreated, a person wouldn’t be harmed by their cancer. When these harmless cancers are found they’re said to be ‘overdiagnosed’. This happens more often with certain types of cancer, and is usually tied to particular types of cancer screening that test people without symptoms, such as breast screening.
See original article at: http://scienceblog.cancerresearchuk.org/2018/03/06/overdiagnosis-when-finding-cancer-can-do-more-harm-than-good/