Figure 2

Distribution of tumour size and mode of detection according to dense area quintiles measured using (A) Cumulus and (B) AutoDensity . Screen-detected and interval cancers (marked as dark and light bars) are shown separately but stacked to indicate the size distribution of all cancers detected in each breast density quintile as well as the relative representation of screen-detected and interval cancers in this distribution. The dashed line represents the expected tumour size distribution within each breast density group if the distribution of tumour size did not vary according to breast density.