The U.S. Food and Drug Administration (FDA) has issued a warning to patients who had mammograms at a breast imaging facility in Puerto Rico.
The warning concerns possible problems with the quality of mammograms performed at San Sebastian X-Ray in San Sebastian, Puerto Rico, any time after February 27, 2011, according to the FDA. The agency worked with the American College of Radiology (ACR) during San Sebastian's accreditation renewal; a sampling of mammograms performed at the facility between February 27, 2011, and February 27, 2013, included poor-quality exams.
"This does not mean that the results of the examinations were inaccurate, but it does mean that patients need to have their tests re-evaluated and should speak to their healthcare providers about whether their tests need to be repeated," the agency said.
San Sebastian X-Ray no longer performs mammography due to a denial of its accreditation by the ACR and the expiration of its Mammography Quality Standards Act (MQSA) certification by the FDA.











![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)






