The symptoms vary depending on what part of the pancreas — the head, body or tail — the cancer develops in.
The most common type of pancreatic cancer is ductal adenocarcinoma which starts in the cells that produce digestive juices.
Some of the most common signs, as described by Cancer Research UK, are as follows:
Pain in the stomach or back

One of the most common symptoms of pancreatic cancer is pain in the upper abdomen, accompanied by back pain. This pain is usually constant and dull. At the early stages, the pain may come and go, but as the tumor grows larger it tends to be more constant and last longer.