A low or intermediate grade well differentiated tumor with neuroendocrine differentiation that arises from the pancreas. It is characterized by the absence of a hormone-related clinical syndrome. The disease is non-functional pancreatic neuroendocrine tumor (MONDO_0004334). Also known as: inactive pancreatic endocrine tumor, inactive pancreatic endocrine tumour, non-functioning PNET, non-functioning pancreatic NET, non-functioning pancreatic endocrine tumor, non-functioning pancreatic endocrine tumour, non-functioning pancreatic neuroendocrine tumor, non-functioning pancreatic neuroendocrine tumour.