colorectal neuroendocrine tumor G1 rectal neuroendocrine tumor rectal neuroendocrine tumor G1 carcinoid tumor of the rectum MONDO:0021534 GARD:0025332 UMLS:C1335678 rectum NET G1 rectum carcinoid tumor (disease) rectal carcinoid tumour carcinoid of rectum rectal neuroendocrine tumor G1 rectum carcinoid tumour (disease) rectum carcinoid tumor carcinoid tumour of the rectum A well differentiated, low grade neuroendocrine tumor (carcinoid tumor) that arises from the rectum. The mitotic count is less than 2 per 10 HPF and/or the Ki67 index is equal to or less than 2 percent. rectal carcinoid rectum neuroendocrine neoplasm G1 rectum neuroendocrine tumor, well differentiated, low grade NCIT:C5547 carcinoid tumour of rectum carcinoid tumor of rectum rectal NET G1 MEDGEN:233389 carcinoid of the rectum grade 1 neuroendocrine neoplasm of rectum rectum carcinoid tumour rectal carcinoid tumor SCTID:713306000