label: Digestive System Neuroendocrine Tumor G1
label_lc: digestive system neuroendocrine tumor g1
description: A well-differentiated, low-grade neuroendocrine neoplasm that arises from the digestive system. The mitotic count is less than 2 per 2 mm2 and the Ki-67 index is less than 3%. The tumor can occur anywhere in the digestive system; approximately 90% arise in the appendix.