New-Onset Diabetes

Type 2 diabetes has a bidirectional causal relationship with pancreatic cancer — it functions as both a symptom and a risk factor. About 40% of pancreatic cancer patients in one study had been diagnosed with diabetes during the previous three years. A pancreatic tumor can destroy or compress insulin-producing beta cells. Beta-cell damage can lower insulin production, raise glucose, and resemble type 2 diabetes in lab results. Pancreatic tumors can disrupt the islets of Langerhans, impairing insulin production. New-onset diabetes in middle-aged or older adults with no prior blood sugar history should prompt investigation into pancreatic health. New-onset diabetes after age 50 without classical risk factors can be managed as ordinary type 2 diabetes even when caused by pancreatic cancer.