Monarch Disease Ontology term MONDO_0021535 (pancreatic neuroendocrine tumor G1) is a low grade well differentiated tumor with neuroendocrine differentiation that arises from the pancreas. The mitotic count is less than 2 per 10 HPF and/or the Ki67 index is equal or less than 2%. Also known as: grade 1 neuroendocrine neoplasm of pancreas, pancreas NET G1, pancreas carcinoid tumor, pancreas carcinoid tumour, pancreas neuroendocrine neoplasm G1, pancreas neuroendocrine tumor, well differentiated, low grade, pancreatic NET G1.