has characteristic has characteristic disease has location digestive system neuroendocrine tumor, grade 1/2 rectum neuroendocrine neoplasm rectal neuroendocrine tumor https://github.com/monarch-initiative/mondo/issues/7618 rectal well differentiated neuroendocrine neoplasm MONDO:0015068 UMLS:C5554035 GARD:0025058 A well differentiated, low or intermediate grade tumor with neuroendocrine differentiation that arises from the rectum. rectal well-differentiated neuroendocrine neoplasm MEDGEN:1810164 NCIT:C135213 Orphanet:100081 https://github.com/monarch-initiative/mondo/pull/8065 neuroendocrine tumor of rectum, well differentiated, low or intermediate grade neuroendocrine neoplasm tumor grade 1 or 2, general grading system rectum