How do you identify the Islet of Langerhans tumors? What are the symptoms of Pancreatic Islet Cell Tumor? Normally, patients suffering from this timorous symptom show abdominal pain and show a lot of anxiety. A lot of people also display peptic ulcers and rapid heartbeats. In some cases, people also show symptoms of sweating and in most cases such people also report loss of consciousness. That seems to be a long list of symptoms, but as doctors point out that more the symptoms, easier the treatment is for the disorder.