AI Model Detects Pancreatic Cancer Up to 3 Years Before Symptoms Appear on Routine CT Scans

New AI model spots hidden pancreatic cancer long before diagnosis

By Dr. Sanchari Sinha Dutta, Ph.D.Reviewed by Lauren HardakerMay 7 2026 A next-generation AI model uncovers invisible signs of pancreatic cancer on standard CT scans long before symptoms appear, potentially transforming early detection and improving outcomes in one of the deadliest cancers Study: Next-generation AI for visually occult pancreatic cancer detection in a low-prevalence setting with longitudinal stability and multi-institutional generalisability. Image credit: crystal light/Shutterstock.com Mayo Clinic researchers have developed an artificial intelligence-powered model that can detect pancreatic cancer on routine abdominal CT scans well before its clinical diagnosis. The study is published online in the journal Gut. Why pancreatic cancer is usually detected too late Pancreatic cancer is one of the deadliest cancers with a five-year survival rate of less than 15 %. It has been predicted to be the second leading cause of cancer-related deaths in the United States by 2030. The diagnosis of pancreatic cancer is primarily based on its symptoms, which mostly remain undetectable at early stages. Because of this reason, more than 85 % of cases remain undiagnosed until the cancer spread to other organs and become unmanageable by therapeutic interventions. Early detection is considered the most effective strategy to improve overall survival of pancreatic cancer. Glycemically-defined new onset diabetes (gNOD) is gaining interest as an early clinical sign of pancreatic cancer, and the National Institute for Health and Care Excellence (NICE) currently recommends urgent abdominal CT scans for individuals aged 60 years or older with gNOD and weight loss. However, conventional imaging often fails to detect malignant lesions at a curable stage due to certain factors, including perceptual error, technical problems, or absence of any discernible mass (imaging-occult). To overcome these limitations and improve early diagnosis, researchers at Mayo Clinic, USA, developed a new-generation AI model named Radiomics-based Early Detection Model (REDMOD) to identify apparently invisible subclinical alterations of pancreatic cancer at a pre-clinical (stage 0) phase that may be amenable to curative intervention. The researchers trained their AI model with 156 pre-diagnostic and 813 control abdominal CT scans (controls confirmed to have no evidence of pancreatic ductal adenocarcinoma, with benign findings permitted) from multiple institutes. Pre-diagnostic scans referred to incidental CTs obtained months to years prior to clinical diagnosis of pancreatic cancer. The model was subsequently validated using an independent set of abdominal CT scans, including 63 pre-diagnostic and 430 control scans. AI detects hidden pancreatic cancer months before diagnosis The validation analysis using the independent test set revealed that the AI model REDMOD can identify 73 % of those pre-diagnostic cancers at a median lead time of approximately 16 months before clinical diagnosis, achieving an area under the curve (AUC) of 0.82. This corresponded to nearly 2-fold higher detection rate than specialists reviewing the same scans without AI assistance. The detection rate increased to nearly 3-fold for scans obtained more than two years before diagnosis. Notably, the AI model exhibited consistent and stable predictive accuracy over time across CT scans obtained from multiple institutions, imaging systems, and protocols. Furthermore, the model consistently predicted the same results in patients with multiple scans obtained months apart. These features support its clinical use for early detection and longitudinal monitoring. The mechanistic analysis showed that the model can capture even subtle biological changes at the early stage of cancer development by analyzing several quantitative imaging features that describe tissue texture and structure. The exclusive inclusion of filtered radiomic features was found to be the primary drivers of the predictive ability of the model. Early AI detection could enable intervention before symptoms The study describes the development and validation of a fully automatic AI model that outperformed radiologists in terms of identifying apparently invisible clinical signs of pancreatic cancer on routine abdominal CT scans that were obtained for other reasons up to three years before the clinical cancer diagnosis. This early detection of pancreatic cancer well before the appearance of visible tumor mass could have significant clinical implications by enabling earlier intervention, potentially improving cancer prognosis. The detection of pancreatic cancer at a potentially curable pre-clinical stage would be particularly vital for high-risk individuals, including those with gNOD and weight loss. Overall, the study findings highlight the significance of implementing AI-powered workflow in clinical settings to improve the accuracy of early cancer detection. However, the model achieved a specificity of about 81 % and a relatively modest precision, highlighitng the importance of managing false positives in screening contexts. In absence of visible cancerous changes, there remains a risk of automation bias where readers uncritically accept AI predictions. To address automation bias, researchers are advancing their work using Artificial Intelligence for Pancreatic Cancer Early Detection, or AI-PACED, an upcoming prospective study that will quantify automation bias and establish optimal override criteria so that algorithmic alerts prompt appropriate risk-stratified evaluation rather than premature intervention. They are also combining AI analysis of routine imaging with longitudinal follow-up to assess performance, including early detection, false positives, and clinical outcomes. With further clinical validations, the AI model REDMOD could serve as a triage and longitudinal monitoring tool to overcome the negative consequences of deadliest pancreatic cancer associated with late-stage symptomatic diagnosis. The study did not validate the performance of REDMOD across different racial and ethnic groups. Future studies should focus on this matter given known disparities in pancreatic cancer risk among individuals with gNOD. Download your PDF copy by clicking here. Journal reference: Mukherjee S. (2026). Next-generation AI for visually occult pancreatic cancer detection in a low-prevalence setting with longitudinal stability and multi-institutional generalizability. Gut. DOI: https://gut.bmj.com/content/early/2026/04/22/gutjnl-2025-337266. https://gut.bmj.com/content/early/2026/04/22/gutjnl-2025-337266

New AI model spots pancreatic cancer up to 3 years earlier than human doctors in test

A new AI tool finds early hints of pancreatic cancer in CT scans that doctors would otherwise miss, an early test found. A new artificial intelligence (AI) model can help doctors detect pancreatic cancer up to three years before physicians typically spot tumors on CT scans, a new study suggests. The program, described April 28 in the journal Gut, was used to analyze almost 2,000 CT scans that had been previously cleared as "normal," bearing no signs of disease. The tool identified tiny irregularities in the structure of the pancreas that later developed into tumor tissue. Early detection is the single biggest factor in pancreatic cancer patients' survival. Therefore, the model could potentially enable physicians to begin effective treatment while the disease is still curable, the study authors said. A chance to detect cancer early Pancreatic cancer is one of the deadliest cancers. "The five-year survival rate [in the U.S.] is about 12% to 13% because of our inability to detect it at a time when therapeutic options could work their magic," study co-author Dr. Ajit Goenka, a radiologist and nuclear medicine specialist at the Mayo Clinic in Rochester, Minnesota, told Live Science. The early stages of pancreatic cancer often don't trigger any symptoms, so the disease is often advanced at the point of diagnosis. Although doctors' ability to catch and treat many other cancers has improved in recent decades, no corresponding breakthrough has been seen in pancreatic cancer. Diagnosis typically involves a combination of tissue sampling and imaging tests, including CT scans. But by the time tumors are visible via these methods, the cancer is often terminal. However, there may be earlier markers of the disease. "The basic science research tells us that the process of cancer development is not something that starts six months earlier," Goenka said. "It starts 10 to 15 years earlier, which means that there was a signal in the pancreas and that signal was outside the purview of human detectability." Leveraging AI to recognize patterns that humans cannot, Goenka and colleagues developed a tool to amplify that existing signal and identify early signs of disease in CT scans. The model, dubbed Radiomics-based Early Detection Model (REDMOD), essentially converts the CT scan image into a mathematical puzzle. It first segments the organ, building a 3D model of the pancreas from the 2D images captured by the CT machine. Then, it evaluates the resulting structure pixel by pixel. "It's taking each and every pixel in that image and it is quantifying the degree to which it differs from the rest of the organ, and then it's comparing that against the controls where you don't expect that change to be present," Goenka explained. "At the end of the day, it's mathematics. It converts that image into a mathematical representation and extracts those mathematical features." The team tested the model on a sample of 2,000 existing CT scans, which were previously collected for medical issues unrelated to cancer and had all been signed off as normal. About one-seventh of the scans belonged to patients who later went on to develop pancreatic cancer. The model successfully identified 73% of these early-stage cases, and on average, the scans the model analyzed had been taken 16 months before the person's actual diagnosis. "The sensitivity gain over radiologists was nearly twofold across the spectrum, and when you look at even earlier -- more than two years prior to diagnosis -- that sensitivity gain was almost threefold," Goenka said. In other words, the AI tool correctly identified cancer cases earlier than radiologists did, and the earlier in time you look, the greater that performance gap grew. Next steps That said, the AI tool has room for improvement. "The radiologist was less likely to flag a healthy patient incorrectly," Goenka noted. The model correctly identified disease-free patients 81.1% of the time, compared with an average of 92.2% for human radiologists. "So there is a complementary role for both of them, for physician expertise combined with AI augmentation." The study was very well designed and produced some extremely promising results, said Tatjana Crnogorac-Jurcevic, a professor of molecular pathology and biomarkers at Queen Mary University of London who was not involved in the work. "Such early detection would make a huge change in the clinical workup of the patients," she told Live Science. "Because pancreatic cancer is fairly uncommon, general screening as we have now for colon and breast is not going to be feasible, but there are defined high-risk groups for which surveillance will be possible -- individuals with a family history of pancreatic cancer, those with other cancer mutations, and patients with new-onset diabetes." Goenka hopes the model could be routinely implemented in the clinic within the next five years, and the team is currently running clinical trials to further validate that this detection strategy works in practice. Looking forward, combining this REDMOD with other diagnostic methods could yield even greater gains in early detection, Crnogorac-Jurcevic said. "We are developing urine-based tests with exactly the same aim, and having an AI imaging tool to combine with our body fluid biomarkers would be fantastic," she said. "It's highly likely that they will be complementary, which would increase the sensitivity and accuracy of early detection massively."