- Tumours that earlier were called carsinoids are according to the new WHO classification called neuroendocrine (NE) tumours. - The WHO 2010 classification does not take stand on the malignancy of the tumour. - About 2% of cancers of the gastrointestinal tract and pancreas are neuroendocrine tumours. - Most commonly located in the caecum - Incidence - Gastrointestinal tract 8.4/100 000 - Pancreas 1/100 000 (insulinoma 0.5/100 000, gastrinoma 0.05/100 000, vipoma 1/10 million)