Computed tomography (CT, top) and coloured positron emission tomography (PET, centre) scans in axial section of the abdomen of a 74 year old male patient with a pancreatic cancer (in squares). The scans are combined at bottom. This is a pancreatic neuroendocrine tumour (NET), or islet cell carcinoma, a rare form of pancreatic cancer. The cancer originates in islet cells, which produce hormones. The cancer may or may not cause symptoms depending on whether, and which, hormone-producing cells are affected. If hormone producing cells are affected there will be an overproduction of that hormone. This cancer can grow quickly and metastasise to other organs. The radioactive tracer 68Ga-DOTATOC has been used to highlight the cancer. It binds to somatostatin receptors, which are also present in the liver (left) and spleen (right), both of which are healthy.