disease has location appendiceal neoplasm colon neuroendocrine neoplasm neuroendocrine neoplasm appendix neuroendocrine neoplasm A neoplasm with neuroendocrine differentiation that arises from the appendix. It includes well differentiated neuroendocrine tumors (low and intermediate grade) and poorly differentiated neuroendocrine carcinomas (high grade). MONDO:0024501 vermiform appendix neuroendocrine tumour vermiform appendix NET NCIT:C60709 vermiform appendix neuroendocrine tumor neuroendocrine neoplasm of vermiform appendix vermiform appendix neuroendocrine tumor, well differentiated, low or intermediate grade UMLS:C1879718 appendix neuroendocrine neoplasm GARD:0025404 vermiform appendix neuroendocrine neoplasm MEDGEN:361887 vermiform appendix