The governor of Missouri has signed a breast density reporting bill into law.
Gov. Jay Nixon signed the bill on June 30 in Joplin, making Missouri the 19th state to implement a law requiring breast density notification. The law states that starting on January 1, 2015, breast density information must be included in mammography reporting results sent to patients.
The bill was introduced during the current legislative session after a similar bill introduced in 2010 failed to proceed to a full chamber vote. Missouri resident Lori Jackson told legislators of her battle with a missed breast cancer in the earlier session but passed away in October 2012, according to the public advocacy group Are You Dense.











![A normal mammogram confirmed by three-year radiologic follow-up illustrates reader-marked regions of interest (ROIs) during (A) unaided (round 1) and (B) artificial intelligence (AI)–assisted (round 2) reading. Each colored dot represents an ROI for recall by a human reader. Readers could mark more than one ROI per case, represented by multiple dots of the same color. During AI-assisted reading, the AI system displayed three visible prompts: two with suspicion of malignancy scores of 35% (left mediolateral oblique [L MLO] and craniocaudal [L CC]) and one with a suspicion of malignancy score of 10% (right craniocaudal [R CC]), shown as polygonal overlays. Without AI, six of 10 readers (60%) marked a false-positive ROI. With AI assistance, this fell to two of 10 (20%). R MLO = right mediolateral oblique.](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/07/2026-07-14-radiology-mammogram-ai-auto-bias.H0bYO8QlWs.jpg?auto=format%2Ccompress&fit=crop&h=112&q=70&w=112)






