Experts are issuing the advice as they believe that the blood sugar condition may be an early warning sign of the aggressive tumours, which are typically discovered too late to treat.
Research suggests that about 3% of pancreatic cancer sufferers will have been diagnosed with type 2 diabetes in the 18 months before their cancer diagnosis.
Ross Carter, consultant pancreatic surgeon at Glasgow Royal Infirmary, said: "Type 2 diabetes is generally age- and obesity-related. But when type 2 is found in patients who do not fit the profile, it should be considered a red flag."
Some UK doctors now offer CT scans - the only reliable test for pancreatic cancer - to these patients to ensure it is not the first symptom of the much more serious problem.
Dr Paul Bennett, of the Westlands Medical Centre in Portchester, examined the records of his practice’s 10000 patients after watching an educational film three years ago produced by UK charity Pancreatic Cancer Action (PCA) highlighting the link between the disease and diabetes.
His own research suggests that as many as one in ten atypical type 2 diabetes cases - those not linked to weight gain - could be an early warning sign of the devastating cancer, which kills more than 8800 Britons a year.
Backing this drive is PCA founder Ali Stunt, who discovered she had pancreatic cancer a year after being diagnosed with type 2 diabetes, despite being a healthy size 10.
This year Ali, now 51, celebrated an astonishing ten years’ survival.
Fewer than 1% of pancreatic cancer patients live this long. The disease has the worst survival rate of any cancer, with 80% of sufferers diagnosed too late for lifesaving treatment.
Ali said: "Even though it was picked up relatively early, its proximity to major blood vessels would soon have rendered the cancer inoperable.
"Research has shown that pancreatic cancer patients will have visited their GP four times on average before being referred to a specialist for a scan. I saw mine more than that. But type 2 diabetes not associated with weight gain is often one of the earliest signs of pancreatic cancer, as it was in my case."
Ali was diagnosed after being referred to a pancreatic specialist who immediately admitted her to hospital for a CT scan.
Within five days, she was having a five-hour operation to remove a large tumour. After six months of chemotherapy and radiotherapy, she quit her job studying meteorites to set up PCA with the aim of improving early detection and therefore survival rates. - The Daily Mail