Pancreatic cancer is one of the deadliest cancers because it is extremely hard to detect in time to treat it. The links between obesity and pancreatic cancer are very clear. The pancreas produces insulin and insulin overproduction appears to trigger cell growth within the pancreas.
Being overweight increases insulin levels in the blood and belly fat in particular is linked to pancreatic cancer. Diabetes also increase the odds. There may be a genetic link as well.