label: Small Intestinal Neuroendocrine Carcinoma
label_lc: small intestinal neuroendocrine carcinoma
description: An aggressive high-grade carcinoma with neuroendocrine differentiation that arises from the small intestine. It is composed of malignant small or large cells. The mitotic count is more than 20 per 2 mm2 and/or the Ki-67 index is more than 20%.