Cancer screening in harms way

A literature review, from researchers in Copenhagen and Lisbon, assessed 57 cancer screening trials and found false positive results and overdiagnosis had been quantified in only 4% and 7% of the trials reviewed.

In contrast, the effect of screening on cancer-specific mortality was reported in 89% of trials.

It was previously unknown whether harms were routinely quantified in cancer screening trials that target healthy patients.

Chris Del Mar, professor of